Letters 105.8

Where there is an evil conscience something may bring safety, but nothing can bring ease; for a man imagines that, even if he is not under arrest, he may soon be arrested. His sleep is troubled; when he speaks of another man’s crime, he reflects upon his own, which seems to him not sufficiently blotted out, not sufficiently hidden from view. A wrongdoer sometimes has the luck to escape notice but never the assurance thereof. Farewell.

Seneca, Letters to Lucilius 105.8, translated by Richard Mott Gummere