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.

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

Reality is merely an illusion, albeit a very persistent one.

I have deeply regretted that I did not proceed far enough at least to understand something of the great leading principles of mathematics, for men thus endowed seem to have an extra sense.

Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.

Mechanics is the paradise of the mathematical sciences, because by means of it one comes to the fruits of mathematics.