If you've got a talent, protect it.
The wise does at once what the fool does at last.
Quality is not an act, it is a habit.
You never know what motivates you.
Be thine own palace, or the world's thy jail.
Without hard work, nothing grows but weeds.
Be gentle to all and stern with yourself.
To know oneself, one should assert oneself.
I can, therefore I am.
Leap, and the net will appear.
God sleeps in the minerals, awakens in plants, walks in animals, and thinks in man.
Science already contained all that was necessary, if you just brought it out.