Time is not at all what it seems. It does not flow in only one direction, and the future exists simultaneously with the past.

A theory can be proved by experiment; but no path leads from experiment to the birth of a theory.

Where you see difficulty, I see opportunity.

A man's value to the community primarily depends on how far his feelings, thoughts, and actions are directed towards promoting the good of his fellows.

But their intervention makes our acts to serve ever less merely the immediate claims of our instincts.

No problem can be solved from the same level of consciousness that created it.

We act as though comfort and luxury were the chief requirements of life. All that we need to make us happy is something to be enthusiastic about.