If you would thoroughly know anything, teach it to others.
The coldest winter I ever spent was a summer in San Francisco.
I mean, I knew that in the abstract there were terrorists somewhere in the world, but they didn't really represent any risk to me.
All that is human must retrograde if it does not advance.
Any transition serious enough to alter your definition of self will require not just small adjustments in your way of living and thinking but a full-on metamorphosis.
Preserving health by too severe a rule is a worrisome malady.
A physicist is an atom's way of knowing about atoms.