Sixty years ago I knew everything. Now I know nothing. Education is a progressive discovery of our own ignorance.
The time when you need to do something is when no one else is willing to do it, when people are saying it can't be done.
The crossroads of trade are the meeting place of ideas, the attrition ground of rival customs and beliefs; diversities beget conflict, comparison, thought; superstitions cancel one another, and reason begins.
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