Every mental state corresponds to a specific brain state.

If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."

"The past is not something that simply disappears; it is something that we carry with us, always."

At the risk of seeming ridiculous, let me say that the true revolutionary is guided by a great feeling of love.

The most exciting aspect of catalysis is the endless possibilities it offers for discovery and innovation.