The leader is one who, out of the clutter, brings simplicity... out of discord, harmony... and out of difficulty, opportunity.

The most important method of education always has consisted of that in which the pupil was urged to actual performance.

Political leaders or governments owe their position partly to force and partly to popular election. They cannot be regarded as representative of best elements, morally or intellectually, in their respective nations.

Gravity is a response to geometry.

Only strong characters can resist the temptation of superficial analysis.

Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions.

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.