Related:

• He who falls in love with himself will have no rivals.
• He that falls in love with himself, will have no rivals. -- Ben Frankli
• The greatest of fools is he who imposes on himself, and in greatest concern thinks certainly he knows that which he has least studied, and of which he is profoundly ignorant.
  -- Shaftesbury...
• The wisest man is generally he who thinks himself the least so. -- Boileau
• He knows not how to speak who cannot be silent...Loudness is impotence.
  -- Johann Kaspar Lavater (1741-1801) "Aphorisms on Man" (c.1788)...
• Most powerful is he who has himself in his own power. -- Seneca
• When a man and a women argue, it is often the stupidest of the two who thinks He has won.
• Now tell me: can a man love anyone who hates himself?
  Can he be in harmony with someone else if he's divided in himself, or bring anyone pleasure if he's only a disagreeable nuisance to himself?...
• Who alone has reason to *lie himself out* of actuality?
  He who *suffers* from it. -- Friedrich Nietzsche...