To know oneself, one should assert oneself.
It's always too early to quit.
What you do today can improve all your tomorrows.
If you've got a talent, protect it.
Without hard work, nothing grows but weeds.
Always desire to learn something useful.
Leap, and the net will appear.
Only the educated are free.
The wise does at once what the fool does at last.
Problems are not stop signs, they are guidelines.
The doubt of an earnest, thoughtful, patient and laborious mind is worthy of respect. In such doubt may be found indeed more faith than in half the creeds.