Understanding εἰλικρινής (eilikrinēs) Strong’s G1506: The Divine Quality of Sincerity and Moral Purity that Transforms Christian Character

Pronunciation Guide: eye-lik-rin-ACE

Basic Definition

Strong’s G1506: εἰλικρινής (eilikrinēs) describes something that is judged by sunlight and found to be pure, genuine, and without hidden flaws. In biblical usage, it refers to moral and spiritual purity that can withstand divine scrutiny—a sincerity that is free from hidden motives, pretense, or hypocrisy. It conveys the quality of being transparent before God and others, with inner reality matching outward appearance.

Etymology and Morphology

• Part of Speech: Adjective
• Root Words: Possibly from εἵλη (heilē, “the sun’s ray”) + κρίνω (krinō, “to judge”)
• Alternative Etymology: Some scholars suggest from εἰλέω (eileō, “to turn around”) + κρίνω (to separate/judge)
• Language Origin: Classical Greek
• Primary Usage: Epistolary literature, particularly in contexts addressing Christian character and discernment

εἰλικρινής Morphology:

• εἰλικρινής (nominative masculine/feminine singular) – pure, sincere
• εἰλικρινές (nominative/accusative neuter singular) – pure, sincere
• εἰλικρινοῦς (genitive masculine/feminine/neuter singular) – of purity/sincerity
• εἰλικρινεῖ (dative masculine/feminine/neuter singular) – in/with purity/sincerity
• εἰλικρινεῖς (nominative/accusative masculine/feminine plural) – pure, sincere (plural)
• εἰλικρινῆ (accusative masculine/feminine singular or nominative/accusative neuter plural) – pure, sincere

Origin & History

The term εἰλικρινής has a fascinating etymology that provides insight into its depth of meaning. The most widely accepted derivation comes from εἵλη (heilē, “sunlight”) and κρίνω (krinō, “to judge”), literally meaning “judged by the sun” or “tested by sunlight.” In ancient commerce, cloth merchants would hold fabric up to the sunlight to detect any flaws or impurities that might be hidden in normal lighting—anything that could not withstand the sun’s revealing rays was deemed impure.

In classical Greek literature, Plato used εἰλικρινής in “The Republic” (Book V) to describe pure or unmixed philosophical ideas, contrasting them with mixed or contaminated concepts. Aristotle employed it in “Nicomachean Ethics” to describe virtues in their pure form. The Septuagint rarely uses this exact term, though the concept appears through other vocabulary. By the time of the New Testament, the word had developed strong moral connotations of integrity and sincerity beyond mere physical purity.

Expanded Definitions & Translation Options

• Judged by Sunlight – Something so pure and transparent that it can withstand the most revealing scrutiny
• Unmixed/Uncontaminated – Free from foreign elements that would compromise its essential nature
• Morally Pure – Free from corrupting influences, especially hypocrisy or deceit
• Genuine/Authentic – Having inner reality that matches outward appearance
• Clear Discernment – In Philippians, relates to making clear moral distinctions

εἰλικρινής Translation Options:

• Sincere – Captures the sense of genuineness and authenticity without pretense (2 Corinthians 1:12)
• Pure – Emphasizes the unmixed, uncontaminated quality, especially appropriate when contrasted with corruption (Philippians 1:10)
• Genuine – Highlights authenticity and the absence of façade or misleading appearances (2 Peter 3:1)
• Transparent – Though not commonly used in translations, this captures the etymological picture of something that light can pass through completely, revealing no hidden flaws

Biblical Usage

In the New Testament, εἰλικρινής appears only three times but in significant contexts addressing the quality of Christian character, thought, and discernment. Its usage suggests a spiritual state that goes beyond surface-level righteousness to a deep integrity that can withstand divine examination. This rare word’s strategic placement in Pauline and Petrine epistles underscores its importance in the development of authentic Christian character.

The term appears in contexts addressing practical Christian living, particularly regarding one’s mindset (2 Peter), discernment (Philippians), and conduct (2 Corinthians). In each case, εἰλικρινής represents not merely an absence of evil but a positive quality of spiritual authenticity and transparency before God. When Paul speaks of “εἰλικρινής discernment” in Philippians, he’s referring to a moral clarity untainted by self-interest or cultural compromise.

• “And this I pray, that your love may abound still more and more in real knowledge and all discernment, so that you may approve the things that are excellent, in order to be sincere [εἰλικρινεῖς] and blameless until the day of Christ.” Philippians 1:10
• “For our proud confidence is this: the testimony of our conscience, that in holiness and godly sincerity [εἰλικρινείᾳ, noun form], not in fleshly wisdom but in the grace of God, we have conducted ourselves in the world, and especially toward you.” 2 Corinthians 1:12
• “This is now, beloved, the second letter I am writing to you in which I am stirring up your sincere [εἰλικρινῆ] mind by way of reminder.” 2 Peter 3:1

Cultural Insights

The concept of εἰλικρινής resonated deeply within ancient commerce and craftsmanship. In Greek marketplaces, pottery sellers would often conduct their business in well-lit areas where customers could thoroughly examine vessels for cracks or defects. The highest quality items were those that could withstand intense scrutiny—those that were truly εἰλικρινής. This commercial metaphor would have been immediately understood by Paul’s first-century audience, making his spiritual application all the more powerful.

Within Jewish culture, there existed a parallel concept in the examination of sacrificial animals, which needed to be “without blemish” (תָּמִים, tamim in Hebrew). Just as priests would carefully inspect animals in full daylight before accepting them for sacrifice, so God examines the heart for εἰλικρινής character. This cultural context adds depth to Paul’s prayer in Philippians 1:10 that believers would be εἰλικρινεῖς “until the day of Christ”—the ultimate moment when all hearts are examined by the light of divine judgment. The Messiah Jesus emphasized this concept in His teaching when He spoke of those who “loved darkness rather than light” because their deeds could not withstand examination (John 3:19-21).

Theological Significance

The concept of εἰλικρινής strikes at the heart of authentic spiritual transformation. Unlike outward conformity to rules, which the Pharisees mastered, εἰλικρινής represents a transparency of character that flows from genuine renewal of the inner person. This quality aligns perfectly with יהוה (Yahweh)’s declaration through the prophet Samuel that “man looks at the outward appearance, but יהוה looks at the heart” (1 Samuel 16:7). God’s nature itself is one of perfect εἰλικρινής—there is no shadow or turning in Him (James 1:17), and He desires the same quality in His people.

The theological positioning of εἰλικρινής in Philippians 1:10 is particularly significant, coming after Paul’s prayer for love abounding in knowledge and discernment. This suggests that true sincerity is not naïve or simplistic but rather informed by spiritual wisdom. It represents a maturity where one’s outward actions authentically reflect inner convictions shaped by divine truth. This transformation toward εἰλικρινής character is only possible through the sanctifying work of the Holy Spirit, who progressively brings our hidden places into His light. The Messiah Jesus modeled perfect εἰλικρινής in His earthly ministry—He was the same in private prayer as in public teaching, the same with powerful leaders as with children and outcasts, always transparent, always genuine.

Personal Application

Living with εἰλικρινής in our modern world means developing the courage to be the same person in all contexts—whether in church, at work, with family, or alone with our digital devices. It involves inviting God’s light to shine into areas we might prefer to keep hidden, allowing His gentle exposure to bring healing rather than condemnation. When we pray for εἰλικρινής in our lives, we’re asking the Holy Spirit to align our inner reality with our outward profession, to remove the exhausting burden of maintaining different personas for different audiences.

Practical steps toward εἰλικρινής might include regular self-examination in God’s presence, accountability within trusted spiritual community, and intentional practices of authenticity in small matters that build integrity for larger ones. As we grow in this quality, we’ll likely find our spiritual discernment sharpening as well, for clear perception often follows from a pure heart (Matthew 5:8). The beautiful promise is that a life of εἰλικρινής not only honors God but also brings the refreshment of living without pretense—being fully known and fully loved, just as we truly are.

Related Words

• ἁγνός (hagnos) [hag-NOS] – pure, holy, sacred; focuses more on moral and ceremonial purity, whereas εἰλικρινής emphasizes transparency and genuineness. See G53
• ἀκέραιος (akeraios) [ah-KER-ai-os] – unmixed, pure, innocent; literally “without wax” (possibly referring to the practice of filling pottery cracks with wax to hide defects), sharing εἰλικρινής’s emphasis on being “without hidden flaws.” See G185
• ἀληθής (alēthēs) [ah-lay-THACE] – true, genuine; focuses on factual truthfulness and reality, while εἰλικρινής emphasizes moral transparency and integrity. See G227
• ἄδολος (adolos) [AH-dol-os] – without deceit, sincere; specifically addresses the absence of deceitful intentions, complementing εἰλικρινής’s focus on transparency. See G97
• ἁπλότης (haplotēs) [hap-LOT-ace] – simplicity, sincerity, generosity; conveys singleness of purpose without hidden agendas, sharing εἰλικρινής’s emphasis on undivided integrity. See G572

Did You Know?

• The metaphor behind εἰλικρινής of “judged by sunlight” has a fascinating parallel in modern gemology. Jewelers still use what they call “the window test,” holding diamonds up to natural light to examine their clarity and detect any flaws—essentially the same practice that gave εἰλικρινής its profound meaning of integrity that can withstand scrutiny.
• In ancient papyri from the Egyptian desert, εἰλικρινής appears in business contracts as a guarantee of quality, assuring buyers that goods being sold were “exactly as described” with no hidden defects. These commercial uses help us understand why Paul and Peter chose this particular word to describe authentic Christian character—it conveyed a quality you could trust completely.
• The concept behind εἰλικρινής became so significant in Christian ethics that by the second century, early church fathers like Clement of Alexandria were using it as a technical term for the moral purity expected of believers. In his “Stromata,” Clement discusses εἰλικρινής as essential for those who truly know God, suggesting it had become a recognizable benchmark of genuine faith in the post-apostolic church.

Remember This

εἰλικρινής represents character that has nothing to hide because it has been transformed by the light—the kind of spiritual authenticity that doesn’t fear examination because it has already welcomed God’s gaze into its depths.