To know oneself, one should assert oneself.
Be gentle to all and stern with yourself.
You never know what motivates you.
Know or listen to those who know.
If you've got a talent, protect it.
It's always too early to quit.
If you think you can do it, you can.
Who seeks shall find.
The wise does at once what the fool does at last.
Always desire to learn something useful.
Our learning ought to be our lives' amendment, and the fruits of our private study ought to appear in our public behavior.