Arrian said this quote

Most people, if they know they have done wrong, foolishly suppose they can conceal their error by defending it, and finding a justification for it; but in my belief there is only one medicine for an evil deed, and that is for the guilty man to admit his guilt and show that he is sorry for it. Such an admission will make the consequences easier for the victim to bear, and the guilty man himself, by plainly showing his distress at former transgressions, will find good grounds of hope for avoiding similar transgressions in the future.