There's plenty of room at the bottom.

One of the ways of stopping science would be only to do experiments in the region where you know the law. But experimenters search most diligently, and with the greatest effort, in exactly those places where it seems most likely that we can prove our theories wrong. In other words, we are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.

That is the logical tight-rope on which we have to walk if we wish to interpret nature.

If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar.

As usual, nature's imagination far surpasses our own, as we have seen from the other theories which are subtle and deep.

But there is nothing in biology yet found that indicates the inevitability of death.

Looking back at the worst times, it always seems that they were times in which there were people who believed with absolute faith and absolute dogmatism in something. And they were so serious in this matter that they insisted that the rest of the world agree with them. And then they would do things that were directly inconsistent with their own beliefs in order to maintain that what they said was true.