Another version of this quotation, omitting the "of me" phrase, appears in Life and Letters of Thomas Henry Huxley F.R.S (1900) edited by Leonard Huxley, p. 170
1880s, On the Reception of the Origin of Species (1887)

“So far from a gradual progress towards perfection forming any necessary part of the Darwinian creed, it appears to us that it is perfectly consistent with indefinite persistence in one state, or with a gradual retrogression.”

Thomas Henry Huxley

1860s, Criticisms on "The Origin of the Species" (1864)

“So far as cerebral structure goes… it is clear that Man differs less from the Chimpanzee or the Orang, than these do even from the Monkeys, and that the difference between the brains of the Chimpanzee and of Man is almost insignificant, when compared with that between the Chimpanzee brain and that of a Lemur.”

Thomas Henry Huxley

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 120

“Perhaps the most valuable result of all education is the ability to make yourself do the thing you have to do, when it ought to be done, whether you like it or not; it is the first lesson that ought to be learned; and, however early a man's training begins, it is probably the last lesson that he learns thoroughly.”

Thomas Henry Huxley

"Technical Education" (1877) http://aleph0.clarku.edu/huxley/CE3/TechEd.html 1870s

“We know, that, in the individual man, consciousness grows from a dim glimmer to its full light, whether we consider the infant advancing in years, or the adult emerging from slumber and swoon. We know, further, that the lower animals possess, though less developed, that part of the brain which we have every reason to believe to be the organ of consciousness in man; and as, in other cases, function and organ are proportional, so we have a right to conclude it is with the brain; and that the brutes, though they may not possess our intensity of consciousness, and though, from the absence of language, they can have no trains of thoughts, but only trains of feelings, yet have a consciousness which, more or less distinctly, foreshadows our own. I confess that, in view of the struggle for existence which goes on in the animal world, and of the frightful quantity of pain with which it must be accompanied, I should be glad if the probabilities were in favour of Descartes' hypothesis; but, on the other hand, considering the terrible practical consequences to domestic animals which might ensue from any error on our part, it is as well to err on the right side, if we err at all, and deal with them as weaker brethren, who are bound, like the rest of us, to pay their toll for living, and suffer what is needful for the general good.”

Thomas Henry Huxley

1870s, On the Hypothesis that Animals are Automata, and Its History (1874)

“I have never had the least sympathy with the a priori reasons against orthodoxy, and I have by nature and disposition the greatest possible antipathy to all the atheistic and infidel school. Nevertheless I know that I am, in spite of myself, exactly what the Christian would call, and, so far as I can see, is justified in calling, atheist and infidel.”

Thomas Henry Huxley

Letter to Charles Kingsley (6 May 1863)
1860s

“History warns us, however, that it is the customary fate of new truths to begin as heresies and to end as superstitions; and, as matters now stand, it is hardly rash to anticipate that, in another twenty years, the new generation, educated under the influences of the present day, will be in danger of accepting the main doctrines of the 'Origin of Species' with as little reflection, and it may be with as little justification, as so many of our contemporaries, twenty years ago, rejected them. Against any such a consummation let us all devoutly pray; for the scientific spirit is of more value than its products, and irrationally held truths may be more harmful than reasoned errors.”

Thomas Henry Huxley

"The Coming of Age of The Origin of Species" (1880) http://aleph0.clarku.edu/huxley/CE2/CaOS.html; Collected Essays, vol. 2 1880s