Carl Sagan

sagan

There are many hypotheses in science which are wrong. That’s perfectly all right; they’re the aperture to finding out what’s right. Science is a self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny.
Quoted in Donald R. Prothero and Carl Dennis Buell, Evolution: What the Fossils Say and Why it Matters(2007), 3.

Thomas Henry Huxley

huxley

Cosmic evolution may teach us how the good and evil tendencies of man may have come about; but, in itself, it is incompetent to furnish any better reason why what we call good is preferable to what we call evil than we had before. Some day, I doubt not, we shall arrive at an understanding of the evolution of the aesthetic faculty; but all the understanding in the world will neither increase nor diminish the force of the intuition that this is beautiful and that is ugly.

Thomas Henry Huxley
‘Evolution and Ethics’ (1893). In Collected Essays (1894), Vol. 9, 80.
Can this man be any more wise?

Thomas Henry Huxley

huxley
Every philosophical thinker hails it [The Origin of Species] as a veritable Whitworth gun in the armoury of liberalism.
‘The Origin of Species’ (1860). In Collected Essays (1893), Vol. 2, 23.
Though I sometimes wonder whether these days, evolution is too often associated with liberalism, hence why vast swathes of america still subscribe to creationism, as a reaction purely against liberalism.