I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forgo their use and by some other means to give us knowledge which we can attain by them.

By trying often, the monkey learns to jump from the tree.

If education is always to be conceived along the same antiquated lines of a mere transmission of knowledge, there is little to be hoped from it in the bettering of man's future.

Every addition to true knowledge is an addition to human power.

Human communities depend upon a diversity of talent, not a single conception of ability. At the heart of the challenge is to reconstitute our sense of ability and of intelligence.

If you want to know what a tiger is like, look at a cat.