See the man wise in his own conceit? There is more hope for a fool than for him. Proverbs 26:7 – Bible

Cure yourself of the affliction of caring how you appear to others. Concern yourself only with how you appear before God, concern yourself only with the idea that God may have of you. – Miguel De Unamuno

Virtue would not go to such lengths if vanity did not keep her company. РFran̤ois de la Rochefoucauld

Whatever is done without ostentation, and without the people being witnesses of it, is, in my opinion, most praiseworthy: not that the public eye should be entirely avoided, for good actions desire to be placed in the light; but notwithstanding this, the greatest theater for virtue is conscience. – Marcus Tullius Cicero