Uncertainty that comes from knowledge (knowing what you don't know) is different from uncertainty coming from ignorance.

We're forever teetering on the brink of the unknowable, and trying to understand what can't be understood.

It is always useful, you see, to subject the past life of reform politicians to rather inquisitive research.

The essential building block is...the true love that is impossible to define for those who have never experienced it and unnecessary to define for those who have.

It is the chief characteristic of the religion of science that it works.

My feeling is that as far as creativity is concerned, isolation is required. Creation is embarrassing. For every new good idea you have, there are a hundred, ten thousand foolish ones.

I have written 240 books on a wide variety of topics. . . . Some of it I based on education I received in my school, but most of it was backed by other ways of learning - chiefly in the books I obtained in the public library.