Mathematical discoveries, small or great are never born of spontaneous generation.

One does not ask whether a scientific theory is true, but only whether it is convenient.

Doubting everything and believing everything are two equally convenient solutions that guard us from having to think

When the physicists ask us for the solution of a problem, it is not drudgery that they impose on us, on the contrary, it is us who owe them thanks.

Why is it that showers and even storms seem to come by chance, so that many people think it quite natural to pray for rain or fine weather, though they would consider it ridiculous to ask for an eclipse by prayer.

...the feeling of mathematical beauty, of the harmony of numbers and of forms, of geometric elegance. It is a genuinely aesthetic feeling, which all mathematicians know

Just as houses are made of stones, so is science made of facts.