Well done is better than well said.
Leap, and the net will appear.
Only the educated are free.
If you're going through hell, keep going.
Be kind whenever possible. It is always possible.
Never complain and never explain.
It's always too early to quit.
Do not weep do not wax indignant. Understand.
To know oneself, one should assert oneself.
Problems are not stop signs, they are guidelines.
The frontiers of knowledge in the various fields of our subject are expanding at such a rate that, work as hard as one can, one finds oneself further and further away from an understanding of the whole.