The content of scientific theory itself offers no moral foundation for the personal conduct of life.

A human being is a part of the whole called by us universe; a part limited in time and space. He experiences himself, his thoughts, and his feelings as something separate from the rest - a kind of optical delusion of consciousness.

Information is not knowledge. The only source of knowledge is experience. You need experience to gain wisdom.

Infinite striving to be the best is man's duty; It is its own reward. Everything else is in god's hands. It's not that I'm so smart, it's just that I stay with problems longer.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

I soon learned to scent out that which was able to lead to fundamentals and to turn aside from everything else, from the multitude of things which clutter up the mind and divert it from the essential.

To see with one's own eyes, to feel and judge without succumbing to the suggestive power of the fashion of the day, to be able to express what one has seen and felt in a snappy sentence or even in a cunningly wrought word - is that not glorious? Is it not a proper subject for congregation?