Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

I don't like the intellectual label.

In order for us to have a future that's exciting and inspiring, it has to be one where we're a space-bearing civilization.

If you would know the value of money, go and try to borrow some.

But such is the irresistible nature of truth, that all it asks, and all it wants is the liberty of appearing.