Be gentle to all and stern with yourself.
Always desire to learn something useful.
If you're going through hell, keep going.
Leap, and the net will appear.
If you can dream it, you can do it.
Only the educated are free.
Expect problems and eat them for breakfast.
Do not weep do not wax indignant. Understand.
Know or listen to those who know.
The wise does at once what the fool does at last.
The object of pure physics is the unfolding of the laws of the intelligible world the object of pure mathematics that of unfolding the laws of human intelligence.