Formerly Milton's Paradise Lost had been my chief favourite, and in my excursions during the voyage of the Beagle, when I could take only a single small volume, I always chose Milton.

Many kinds of monkeys have a strong taste for tea, coffee and spirituous liqueurs.

Intelligence is based on how efficient a species became at doing the things they need to survive.

Man is developed from an ovule, about 125th of an inch in diameter, which differs in no respect from the ovules of other animals.

Another source of conviction in the existence of God, connected with the reason and not with the feelings, impresses me as having much more weight. This follows from the extreme difficulty or rather impossibility of conceiving this immense and wonderful universe, including man with his capacity of looking far backwards and far into futurity, as the result of blind chance or necessity. When thus reflecting I feel compelled to look to a First Cause having an intelligent mind in some degree analogous to that of man; and I deserve to be called a Theist.

The most important factor in survival is neither intelligence nor strength but adaptability.

Our descent, then, is the origin of our evil passions!! The devil under form of Baboon is our grandfather.