Falsehood often lurks upon the tongue of him, who, by self-praise, seeks to enhance his value in the eyes of others. - Arnold Bennett
Self-praise is for losers. Be a winner. Stand for something. Always have class, and be humble. - Auliq Ice
Most of our censure of others is only oblique praise of self, uttered to show the wisdom and superiority of the speaker. It has all the insidiousness of self-praise, and all the ill-desert of falsehood.