From all we have learnt about the structure of living matter, we must be prepared to find it working in a manner that cannot be reduced to the ordinary laws of physics. And that not on the ground that there is any 'new force' or what not, directing the behaviour of the single atoms within a living organism, but because the construction is different from anything we have yet tested in the physical laboratory.

An animal that embarks on forming states without greatly restricting egoism will perish.

If you cannot - in the long run - tell everyone what you have been doing, your doing has been worthless.

The world is a construct of our sensations, perceptions, memories. It is convenient to regard it as existing objectively on its own. But it certainly does not become manifest by its mere existence.

The essential feature of statistics is a prudent and systematic ignoring of details.

If all this damned quantum jumping were really here to stay, I should be sorry, I should be sorry I ever got involved with quantum theory.

If a man never contradicts himself, the reason must be that he virtually never says anything at all.