It's always too early to quit.
The dog that trots about finds a bone.
The secret of getting ahead is getting started.
Problems are not stop signs, they are guidelines.
What you do today can improve all your tomorrows.
Things do not happen. Things are made to happen.
I can, therefore I am.
Leap, and the net will appear.
To know oneself, one should assert oneself.
Expect problems and eat them for breakfast.
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.