Never complain and never explain.
Only the educated are free.
Do not weep do not wax indignant. Understand.
Be thine own palace, or the world's thy jail.
By failing to prepare, you are preparing to fail.
Know or listen to those who know.
The dog that trots about finds a bone.
Problems are not stop signs, they are guidelines.
If you think you can do it, you can.
I can, therefore I am.
He who devotes sixteen hours a day to hard study may become at sixty as wise as he thought himself at twenty.