Theory attracts practice as the magnet attracts iron.

Mathematics is concerned only with the enumeration and comparison of relations.

Mathematics is the queen of science, and arithmetic the queen of mathematics.

The enchanting charms of this sublime science reveal only to those who have the courage to go deeply into it.

Mathematicians stand on each other's shoulders.

There have been only three epoch-making mathematicians, Archimedes, Newton, and Eisenstein.

The Infinite is only a manner of speaking.

I have had my results for a long time: but I do not yet know how I am to arrive at them.

Life stands before me like an eternal spring with new and brilliant clothes.

You have no idea, how much poetry there is in the calculation of a table of logarithms!

I could trust a fact and always cross-question an assertion.

Nothing is to wonderful to be true.

Chemistry is necessarily an experimental science: its conclusions are drawn from data, and its principles supported by evidence from facts.

The lecturer should give the audience full reason to believe that all his powers have been exerted for their pleasure and instruction.

It may be a weed instead of a fish that, after all my labour, I at last pull up.

Who would not have been laughed at if he had said in 1800 that metals could be extracted from their ores by electricity or that portraits could be drawn by chemistry.

Physicist is both to my mouth and ears so awkward that I think I shall never use it. The equivalent of three separate sounds of "I" in one word is too much.

... and what good is a baby?

There is no more open door by which you can enter into the study of natural philosophy than by considering the physical phenomena of a candle