Do I contradict myself? Very well then I contradict myself. I am large, I contain multitudes.
-- Whitman
The sole cause of all human misery is the inability of people to sit quietly in their rooms.
-- Pascal
A problem worthy of attack proves its worth by fighting back.
-- [well-known old mathematics saying, unattributed]
The road to wisdom? Well, it's plain and simple to express:
Err and err and err again
but less and less and less.
-- Piet Hein