How I wish that somewhere there existed an island for those who are wise and of good will.

However we select from nature a complex [of phenomena] using the criterion of simplicity, in no case will its theoretical treatment turn out to be forever appropriate (sufficient).... I do not doubt that the day will come when [general relativity], too, will have to yield to another one, for reasons which at present we do not yet surmise. I believe that this process of deepening theory has no limits.

Common sense is nothing more than a deposit of prejudices laid down by the mind before you reach eighteen.

Nothing will benefit human health and increase the chances for survival of life on Earth as much as the evolution to a vegetarian diet.

Whatever there is of God and goodness in the universe, it must work itself out and express itself through us. We cannot stand aside and let God do it.

I simply imagine it so, then go about to prove it.

Smoke like a chimney, work like a horse, eat without thinking, go for a walk only in really pleasant company.