Solving problems is a practical art, like swimming, or skiing, or playing the piano: you can learn it only by imitation and practice.

The open secret of real success is to throw your whole personality into your problem.

The principle is so perfectly general that no particular application of it is possible.

Solving problems is a practical art, like swimming, or skiing, or playing the piano: you can learn it only by imitation and practice.

The world is anxious to admire that apex and culmination of modern mathematics: a theorem so perfectly general that no particular application of it is feasible.

My method to overcome a difficulty is to go round it.

Mathematics is the cheapest science. Unlike physics or chemistry, it does not require any expensive equipment. All one needs for mathematics is a pencil and paper.