It's always too early to quit.
Always desire to learn something useful.
Problems are not stop signs, they are guidelines.
Be thine own palace, or the world's thy jail.
Only the educated are free.
If you've got a talent, protect it.
Well done is better than well said.
If you think you can do it, you can.
By failing to prepare, you are preparing to fail.
Never complain and never explain.
Wonder, connected with a principle of rational curiosity, is the source of all knowledge and discover, and it is a principle even of piety but wonder which ends in wonder, and is satisfied with wonder, is the quality of an idiot.