Pure mathematics is, in its way, the poetry of logical ideas.

Do not worry about your problems with mathematics, I assure you mine are far greater.

Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.

But the creative principle resides in mathematics. In a certain sense, therefore, I hold true that pure thought can grasp reality, as the ancients dreamed.

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.

a purely algebraic physics.