It is not the biggest, the brightest or the best that will survive, but those who adapt the quickest.

...all nature is perverse & will not do as I wish it.

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

Ultimately a highly complex sentiment, having its first origin in the social instincts, largely guided by the approbation of our fellow-men, ruled by reason, self-interest, and in later times by deep religious feelings, confirmed by instruction and habit, all combined, constitute our moral sense or conscience.

The man who walks with Henslow.

The love for all living creatures is the most noble attribute of man.

I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in the wild duck; and this change may be safely attributed to the domestic duck flying much less, and walking more, than its wild parents.