It is not the most intellectual of the species that survives; it is not the strongest that survives; but the species that survives is the one that is….

I shall always feel respect for every one who has written a book, let it be what it may, for I had no idea of the trouble which trying to write commo….

A celebrated author and divine has written to me that he has gradually learned to see that it is just as noble a conception of the Deity to believe t….

I often had to run very quickly to be on time, and from being a fleet runner was generally successful; but when in doubt I prayed earnestly to God to….

During my second year at Edinburgh [1826-27] I attended Jameson's lectures on Geology and Zoology, but they were incredible dull. The sole effect the….

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 sm….

But just in proportion as this process of extermination has acted on an enormous scale, so must the number of intermediate varieties, which have form….

This fundamental subject of Natural Selection will be treated at some length in the fourth chapter; and we shall then see how Natural Selection almos….

I am almost convinced (quite contrary to opinion I started with) that species are not (it is like confessing a murder) immutable..

Man tends to increase at a greater rate than his means of subsistence..

I agree with Agassiz that dogs possess something very like conscience..

An agnostic would be the more correct description of my state of mind..

It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change, tha….

I cannot persuade myself that a beneficient and omnipotent God would have designedly created...that a cat should play with mice..

The man who walks with Henslow..

The impossibility of conceiving that this grand and wondrous universe, with our conscious selves, arose through chance, seems to me the chief argumen….

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

The more one thinks, the more one feels the hopeless immensity of man's ignorance..

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

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

Building a better mousetrap merely results in smarter mice..