The Same organizing forces that have shaped nature in all her forms are also responsible for the structure of our minds.

Nature is made in such a way as to be able to be understood. Or perhaps I should put it-more correctly-the other way around, and say that we are made in such a way as to be able to understand Nature.

Every tool carries with it the spirit by which it has been created.

Even for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached.

Nature allows only experimental situations to occur which can be described within the framework of the formalism of quantum mechanics

By getting to smaller and smaller units, we do not come to fundamental or indivisible units. But we do come to a point where further division has no meaning.

The very act of observing disturbs the system.