The mind uses its faculty for creativity only when experience forces it to do so.

Intuition is more important to discovery than logic.

Ideas rose in clouds; I felt them collide until pairs interlocked, so to speak, making a stable combination.

All great progress takes place when two sciences come together, and when their resemblance proclaims itself, despite the apparent disparity of their substance.

In the old days when people invented a new function they had something useful in mind.

It is far better to foresee even without certainty than not to foresee at all.

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