Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.

Logic will get you from A to B. Imagination will take you everywhere.

We ourselves feel that what we are doing is just a drop in the ocean. But the ocean would be less because of that missing drop.

He has a right to criticize, who has a heart to help.

Small mindedness can turn a big man into a small man in no time.

Inferiors revolt in order that they may be equal, and equals that they may be superior. Such is the state of mind which creates revolutions.

Political tyranny is nothing compared to the social tyranny and a reformer who defined society is a more courageous man than a politician who defies Government.

Insomnia works like slow poison on our body.

No force on earth can dislodge democracy and rule forever.

When you're a carpenter making a beautiful chest of drawers, you're not going to use a piece of plywood on the back, even though it faces the wall and nobody will ever see it. You'll know it's there, so you're going to use a beautiful piece of wood on the back.

I do not believe in immortality of the individual, and I consider ethics to be an exclusively human concern with no superhuman authority behind it.  

Time is not measured by the passing of years but by what one does, what one feels, and what one achieves.