📖 Biblical Definition
Sincerity is freedom from pretense, deceit, and double-mindedness — the quality of being sun-tested, what holds up when the light falls full upon it. The Latin root sine cera ("without wax") originally described pottery sold without filler-wax patching the cracks. Paul names sincerity as the bread of the Lord’s table: "Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth" (1 Corinthians 5:8). He commends his own apostolic conduct in the same terms: "in simplicity and godly sincerity" (2 Corinthians 1:12). The Christian man is sincere through and through — the same in private as in public, the same in trial as in ease.
📜 Webster 1828 Definition
SINCER'ITY, n.
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1. Honesty of mind or intention; freedom from simulation or hypocrisy; truthfulness. 2. Freedom from hypocrisy, disguise or false pretense. 3. Purity of mind. Christian sincerity — godly sincerity, mentioned 2 Cor. 1.
📖 Key Scripture
1 Corinthians 5:8 — "Let us keep the feast... with the unleavened bread of sincerity and truth."
2 Corinthians 1:12 — "In simplicity and godly sincerity... we have had our conversation in the world."
Joshua 24:14 — "Fear the Lord, and serve Him in sincerity and in truth."
Philippians 1:10 — "That ye may be sincere and without offence till the day of Christ."
⚠️ Modern Corruption
Modern brand-craft replaces sincerity with strategic authenticity.
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The Latin etymology of sincere is contested but vivid: sine cera — “without wax.” Roman sculptors filled cracks in inferior marble with wax; the cheat was hidden until the statue was set in the sun, where the wax melted and the flaw appeared. Sincerity is sun-tested character — nothing patched, nothing concealed, nothing dependent on shade.
Modern self-presentation runs the opposite way: brand-managed authenticity, curated vulnerability, strategic transparency. The sun never quite hits because the staging is too good. Paul's word for the gospel is sterner: godly sincerity, an honesty that thrives in direct light. Pray for it. Live for it. The day of Christ will be a great noon, and only sun-tested marble will stand.
🔗 Greek & Hebrew Roots
Greek eilikrineia (G1505) — tested by sunlight.
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G1505 — eilikrineia — sincerity; sun-tested purity
G1506 — eilikrines — sincere; pure; unmixed
G573 — haplotes — simplicity; singleness of heart
Usage
"Sincerity is sun-tested marble — nothing waxed, nothing patched, nothing hidden."
"Brand-managed authenticity is the wax of our age; the gospel demands the real stone."
"The Lord's table requires unleavened bread of sincerity, not artisanal hypocrisy."