To know oneself, one should assert oneself.
The wise does at once what the fool does at last.
I can, therefore I am.
It's always too early to quit.
By failing to prepare, you are preparing to fail.
Expect problems and eat them for breakfast.
Things do not happen. Things are made to happen.
Leap, and the net will appear.
After a storm comes a calm.
Quality is not an act, it is a habit.
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.