Imagine a puddle waking up one morning and thinking, " This is an interesting world I find myself in, an interesting hole I find myself in; fits me rather neatly, doesn't it? In fact it fits me staggeringly well! It must have been made to have me in it!

Anything that happens, happens. Anything that, in happening, causes something else to happen, causes something else to happen. Anything that, in happening, causes itself to happen again, happens again. It doesn’t necessarily do it in chronological order, though.

The technology involved in making anything invisible is so infinitely complex that nine hundred and ninety-nine billion, nine hundred and ninety-nine million, nine hundred and ninety-nine thousand, nine hundred and ninety-nine times out of a trillion it is much simpler and more effective just to take the thing away and do without it.

One of the major problems encountered in time travel is not that of accidentally becoming your own father or mother. There is no problem involved in becoming your own father or mother that a broadminded and well-adjusted family can't cope with.

So, the world is fine. We don’t have to save the world—the world is big enough to look after itself. What we have to be concerned about, is whether or not the world we live in, will be capable of sustaining us in it. That’s what we need to think about.

My capacity for happiness," he added, "you could fit into a matchbox without taking out the matches first

Lovers of print are simply confusing the plate for the food.