What use are socks? They only produce holes.

No idea is conceived in our mind independent of our five senses [i.e., no idea is divinely inspired].

Isn't it strange that I who have written only unpopular books should be such a popular fellow?

It was the experience of mystery - even if mixed with fear - that engendered religion.

It strikes me as unfair, and even in bad taste, to select a few of them for boundless admiration, attributing superhuman powers of mind and character to them. This has been my fate, and the contrast between the popular estimate of my powers and achievements and the reality is simply grotesque.

The best design is the simplest one that works.

Even if you have to go through hell - go without hesitation.