Example isn't another way to teach, it is the only way to teach

Setting an example is not the main means of influencing another, it is the only means.

A leader leads by example, whether he intends to or not.

I consider it important, indeed urgently necessary, for intellectual workers to get together, both to protect their own economic status and, also, generally speaking, to secure their influence in the political field.

There is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance.

We owe a lot to the Indians, who taught us how to count, without which no worthwhile scientific discovery could have been made