When primeval man first used flint stones for any purpose, he would have accidentally splintered them, and would then have used the sharp fragments. From this step it would be a small one to break the flints on purpose and not a very wide step to fashion them rudely.

...conscience looks backwards and judges past actions, inducing that kind of dissatisfaction, which if weak we call regret, and if severe remorse.

It is absurd to talk of one animal being higher than another...we consider those, where the intellectual faculties most developed as the highest. - A bee doubtless would [use] ... instincts as a criteria.

One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.

I feel like an old warhorse at the sound of a trumpet when I read about the capturing of rare beetles.

...he who remains passive when over-whelmed with grief loses his best chance of recovering his elasticity of mind.

The fact of evolution is the backbone of biology, and biology is thus in the peculiar position of being a science founded on an improved theory, is it then a science or faith?