... mathematics is the science of skillful operations with concepts and rules invented just for this purpose.

The simplicities of natural laws arise through the complexities of the language we use for their expression.

The world is very complicated and it is clearly impossible for the human mind to understand it completely. Man has therefore devised an artifice which permits the complicated nature of the world to be blamed on something which is called accidental and thus permits him to abstract a domain in which simple laws can be found.

The optimist regards the future as uncertain.

It's nice the know the computer understands the situation, but I would like to understand it too.

The miracle of the appropriateness of the language of mathematics for the formulation of the laws of physics is a wonderful gift which we neither understand nor deserve.

[T]he laws of quantum mechanics itself cannot be formulated ... without recourse to the concept of consciousness.