Following the course of least resistance makes for crooked rivers and crooked men.
The most damaging phrase in the language is: It's always been done that way.
Grace Murray Hopper
Common sense is unfortunately not very common.
Turn your face to the sun and the shadows fall behind you.
Nothing gives one person so much advantage over another as to remain always cool and unruffled under all circumstances.
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.
Don't go around saying the world owes you a living. The world owes you nothing. It was here first.
Every man dies. Not every man really lives.