It may be possible to gild pure gold, but who can make his mother more beautiful?

You have to grow from the inside out. None can teach you, none can make you spiritual. There is no other teacher but your own soul.

If the human race wishes to have a prolonged and indefinite period of material prosperity, they have only got to behave in a peaceful and helpful way toward one another. 

There is always the danger that we may just do the work for the sake of the work. This is where the respect and the love and the devotion come in - that we do it to God, to Christ, and that's why we try to do it as beautifully as possible.

I want to put a ding in the universe.

The ballot is stronger than the bullet.

If you know it is going to be a tight-rope walk, you might as well carry a bamboo to balance yourself.

Whatever you do may seem insignificant to you, but it is most important that you do it.

The difference between what we do and what we are capable of doing would suffice to solve most of the world's problems.

You reach a point where you don't work for money.

Our task must be to free ourselves by widening our circle of compassion to embrace all living creatures and the whole of nature and its beauty.

If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.