What a sad era when it is easier to smash an atom than a prejudice.

Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.

One should not pursue goals that are easily achieved. One must develop an instinct for what one can just barely achieve through one’s greatest efforts.

No great discovery was ever made in science except by one who lifted his nose above the grindstone of details and ventured on a more comprehensive vision.

Never lose a holy curiosity.

Knowledge of what is does not open the door directly to what should be.

The hardest thing in the world to understand is income tax.

Reality is merely an illusion, albeit a very persistent one.

There are only two ways to live your life. One as though nothing is a miracle. The other is as though everything is a miracle.

The definition of insanity is doing the same thing over and over and over and over again, but expecting a different result.