Thou mayest as well expect to grow stronger by always eating as wiser by always reading. Too much overcharges Nature, and turns more into disease than nourishment. 'Tis thought and digestion which makes books serviceable, and give health and vigor to the mind.

That which is communicated, i.e., understood, is metaphysical. The means of communication is physical.

Everything you've learned in school as "obvious" becomes less and less obvious as you begin to study the universe.

It is now highly feasible to take care of everybody on Earth at a 'higher standard of living than any have ever known.' It no longer has to be you or me. Selfishness is unnecessary and henceforth unrationalizable as mandated by survival.

Seeing-is-believing is a blind spot in man's vision.

I'm not a genius. I'm just a tremendous bundle of experience.

Man knows so much and does so little.