Employ your time in improving yourself by other men's writings so that you shall come easily by what others have labored hard for.
Socrates
People seldom improve when they have no other model but themselves to copy.
Oliver Goldsmith
Let us strive to improve ourselves, for we cannot remain stationary; one either progresses or retrogrades.
Mme. Du Deffand
The safest principle through life, instead of reforming others, is to set about perfecting yourself.
B. R. Haydon
Change yourself and fortune will change with you.
Portugese Proverb
What you dislike in another take care to correct in yourself.
Thomas Sprat
The highest purpose of intellectual cultivation is to give a man a perfect knowledge and mastery of his own inner self; to render our consciousness its own light and its own mirror.
Frederich Leopold von Hardenberg