There is something I keep doing that the Bible never mentions by name. How do I work out whether it is actually wrong for me?

“Search me, O God, and know my heart: try me, and know my thoughts: And see if there be any wicked way in me, and lead me in the way everlasting.”

David ends a psalm about God's total knowledge of him with an invitation rather than a defense. Having spent the whole poem admitting there is nowhere to hide, he asks to be searched anyway. It is the prayer of a man who suspects his own self-assessment is unreliable and would rather be told the truth than stay comfortable. That posture is where an honest answer starts.

“Hast thou faith? have it to thyself before God. Happy is he that condemneth not himself in that thing which he alloweth. And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin.”

Paul is refereeing a real dispute in Rome over food and holy days, where sincere believers landed in different places. He refuses to hand down a universal rule and points inward instead: act from settled conviction, not from a shrug. His standard is not whether something appears on a list, but whether you can do it in faith, without needing to look away.