Necessity is the mother of all invention.
It is impossible to solve significant problems using the same knowledge that created them.
In the midst of difficulty lies opportunity.
The more I learn, the more I realize I don't know.
More and more I come to value charity and love of one's fellow being above everything else...All our lauded technological progress-our very civilization-is like the axe in the hand of the pathological criminal.
When I think of the most able students I have encountered in my teaching - I mean those who have distinguished themselves not only by skill but by independence of thought - then I must confess that all have had a lively interest in epistemology.