One who deceives will always find those who allow themselves to be deceived.

If we do not lay out ourselves in the service of mankind whom should we serve?

You can best serve civilization by being against what usually passes for it.

An intelligent hell would be better than a stupid paradise.

The cure for pain is in the pain.

I've never known any trouble than an hour's reading didn't assuage.

Science is organized knowledge. Wisdom is organized life.

Think globally, act locally.

In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

Immoderate desire is the mark of a child, not a man.

It's not a question of learning much.On the contrary.It's a question of UNLEARNING much.

He who chooses the beginning of the road chooses the place it leads to.

Early to bed and early to rise, Makes a man healthy, wealthy, and wise.

Each problem that I solved became a rule which served afterwards to solve other problems.

The one you buy will be the only one that doesn't work.

If you only read the books that everyone else is reading, you can only think what everyone else is thinking.

Do not deny the classical approach, simply as a reaction, or you will have created another pattern and trapped yourself there.

Fine clothes may disguise, but silly words will disclose a fool.

I hear and I forget. I see and I remember. I do and I understand.

To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.

Men build too many walls and not enough bridges.