Never contract friendship with a man that is not better than thyself.
Confucius
The greatest gift is a portion of thyself.
Ralph Waldo Emerson
Observe all men, thyself most.
Benjamin Franklin
Be charitable and indulge to everyone, but thyself.
Joseph Joubert
Absolve me, teach me, purify me, strengthen me: take me to Thyself, that I may be Thine and Thine only.
Joseph Barber Lightfoot
Self-awareness is not self-centeredness, and spirituality is not narcissism. 'Know thyself' is not a narcissistic pursuit.
Marianne Williamson
Revere thyself, and yet thyself despise.
Edward Young