The symbol and the metaphor are as necessary to science as to poetry.

It is important that students bring a certain ragamuffin, barefoot irreverence to their studies; they are not here to worship what is known, but to question it.

No science is immune to the infection of politics and the corruption of power.

Ask an impertinent question and you are on the way to the pertinent answer.

Man is unique not because he does science, and his is unique not because he does art, but because science and art equally are expressions of his marvelous plasticity of mind.

Knowledge is an unending adventure at the edge of uncertainty.

The hand is the cutting edge of the mind.

We have to understand that the world can only be grasped by action, not by contemplation. The hand is more important than the eye ... The hand is the cutting edge of the mind.

Man masters nature not by force, but by understanding

Dissent is the mark of freedom.

One aim of physical sciences had been to give an exact picture the material world. One achievement of physics in the twentieth century has been to prove that that aim is unattainable.

If we do not find anything very pleasant, at least we shall find something new.

Start every day by making a list of all the experiences you will fill your day with and make an effort to achieve them.

Love with pride is like chasing the pavement. There'll be a long chasing until it ends.

Climbing mountains is strength

Great talkers are trying to fill the gap between themselves and others but only widen it.

I think you can improve on that natural ability with training and exposure to great leaders of the past and to management theories.

Despite a decade of criticism and budget cuts, the specialised UN agencies have far more expertise and hands-on experience than any other organisations in the world.

Heat is required to forge anything. Every great accomplishment is the story of a flaming heart.

Instead of expecting all and being lowered into despair each time I get less, I expect nothing now and, occasionally, I get a little, and am more than a little happy.

Home should be a haven of love. Honor, courtesy, and respect symbolize love and characterize the righteous family.