An article can be timely, topical, engaged in the issues and personalities of the moment; it is likely to be stale within the month. In five years, it may have acquired the quaint aura of a rotary phone. An article is usually Siamese-twinned to its date of birth.

As long as parents and teachers in general shall fall under the established rule, it is clear that politics and modes of government will educate and infect us all. They poison our minds, before we can resist, or so much as suspect their malignity. Like the barbarous directors of the Eastern seraglios, they deprive us of our vitality, and fit us for their despicable employment from the cradle.

For me, I guess the main motivation is the satisfaction of finally understanding some tricky mathematical concept or phenomenon and then explaining it to others.

Growing up, I took so many cues from books. They taught me most of what I knew about what people did, about how to behave. They were my teachers and my advisers.

I preferred the simplest vocabulary.

It's the way I study - to understand something by trying to work it out or, in other words, to understand something by creating it. Not creating it one hundred percent, of course; but taking a hint as to which direction to go but not remembering the details. These you work out for yourself.