There's nothing in the world so demoralizing as money.

When people talk of the freedom of writing, speaking or thinking I cannot choose but laugh. No such thing ever existed. No such thing now exists; but I hope it will exist. But it must be hundreds of years after you and I shall write and speak no more.

I am not now That which I have been.

There are no facts, only interpretations.

Being powerful is like being a lady. If you have to tell people you are, you aren't.

Laziness never arrived at the attainment of a good wish.

To the young people I say, you are a gift to your communities and indeed the world. You are our hope and our future.

The Declaration of Independence I always considered as a theatrical show. Jefferson ran away with all the stage effect of that... and all the glory of it.

Maybe you are searching among the branches, for what only appears in the roots.

A process cannot be understood by stopping it. Understanding must move with the flow of the process, must join it and flow with it.

The difficulty is to try and teach the multitude that something can be true and untrue at the same time.

I love Madrid. I am happy to be here. I have been here three years and hope to be here longer. But I am proud of where I come from and never forget the people I grew up with.

A scientific man ought to have no wishes, no affections, - a mere heart of stone.

To hell with circumstances; I create opportunities.

Trying to define yourself is like trying to bite your own teeth.

Freedom is from within.

It does not do to dwell on dreams and forget to live.

All men are prepared to accomplish the incredible if their ideals are threatened.

A hero cannot be a hero unless in a heroic world.

I don't try to imagine a personal god; it suffices to stand in awe at the structure of the world, insofar as it allows our inadequate senses to appreciate it.

Many have had their greatness made for them by their enemies.