If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, … - Charles Darwin

If I had my life to live over again, I would make it a rule to read some poetry, listen to some music, and see some painting or drawing at least once a week, for perhaps the part of my brain now atrophied would then have been kept alive through life. The loss of these tastes is a loss of happiness.

The comparison here implied between the actions of one of the higher animals and of one so low in the scale as an earth-worm, may appear far-fetched; for we thus attribute to the worm attention and some mental power, nevertheless I can see no reason to doubt the justice of the comparison.

Man in his arrogance thinks himself a great work worthy the interposition of a deity. More humble, and I believe truer, to consider him created from animals.