First you guess. Don't laugh, this is the most important step. Then you compute the consequences. Compare the consequences to experience. If it disagrees with experience, the guess is wrong. In that simple statement is the key to science. It doesn't matter how beautiful your guess is or how smart you are or what your name is. If it disagrees with experience, it's wrong. That's all there is to it.

Nature uses only the longest threads to weave her patterns, so that each small piece of her fabric reveals the organization of the entire tapestry.

To decide upon the answer is not scientific. In order to make progress, one must leave the door to the unknown ajar ajar only.

It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions.

If you know that you are not sure, you have a chance to improve the situation. I want to demand this freedom for future generations.

There is nothing that living things do that cannot be understood from the point of view that they are made of atoms acting according to the laws of physics.

There is no harm in doubt and skepticism, for it is through these that new discoveries are made.