Biologists can be just as sensitive to heresy as theologians.

No one would have believed in the last years of the nineteenth century that this world was being watched keenly and closely by intelligences greater than man's and yet as mortal as his own; that as men busied themselves about their various concerns they were scrutinised and studied, perhaps almost as narrowly as a man with a microscope might scrutinise the transient creatures that swarm and multiply in a drop of water.

I came out for exercise, gentle exercise, and to notice the scenery and to botanise. And no sooner do I get on that accursed machine than off I go hammer and tongs; I never look to right or left, never notice a flower, never see a view - get hot, juicy, red - like a grilled chop. Get me on that machine and I have to go. I go scorching along the road, and cursing aloud at myself for doing it.

Our true nationality is mankind.

Very much indeed of what we call moral education is such an artificial modification and perversion of instinct; pugnacity is trained into courageous self-sacrifice, and suppressed sexuality into religious emotion.

Nothing remains interesting where anything may happen.

I had just taken to reading. I had just discovered the art of leaving my body to sit impassive in a crumpled up attitude in a chair or sofa, while I wandered over the hills and far away in novel company and new scenes... My world began to expand very rapidly,... the reading habit had got me securely.