Regarding secret, hidden sin...

Douglas Wilson writes,

Three solutions present themselves—two of them false and one true. The first false solution is to continue to hide the sin, on one's own terms, and in one's own way. But Moses' words should follow all who seek this way out—"be sure your sin will find you out." The second seeks to combine biblical truths with pragmatic solutions. "I confessed it to God. What else . . .?" Sometimes there is nothing else but to receive forgiveness. But in other situations, much remains to be done. Stolen goods must still be restored, slandered brothers and sisters must be asked for forgiveness, and broken covenants must be put right. And so the third way, the only effective way, is to want God's mercy so much that you are willing do exactly what He says when you apply to Him for it.

Read the whole thing.