Any fool can know. The point is to understand.

... we will hope that future historians will explain the morbid symptoms of present-day society as the childhood ailments of an aspiring humanity, due entirely to the excessive speed at which civilization was advancing.

What the individual can do is to give a fine example, and to have the courage to uphold ethical values .. in a society of cynics.

I am satisfied with the mystery of the eternity of life.

Women always worry about things that men forget; men always worry about things women remember.

[Newton wrote to Halley ... that he would not give Hooke any credit] That, alas, is vanity. You find it in so many scientists. You know, it has always hurt me to think that Galileo did not acknowledge the work of Kepler.

Time is what the clock says.