Thomas Huxley — English Scientist born on May 04, 1825, died on June 29, 1895

Thomas Henry Huxley PC FRS FLS was an English biologist, known as "Darwin's Bulldog" for his advocacy of Charles Darwin's theory of evolution... (wikipedia)

I am content with nothing, restless and ambitious... and I despise myself for the vanity, which formed half the stimulus to my exertions. Oh would that I were one of those plodding wise fools who having once set their hand to the plough go on nothing doubting.
The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties; blind faith the one unpardonable sin.
The known is finite, the unknown infinite; intellectually we stand on an islet in the midst of an illimitable ocean of inexplicability. Our business in every generation is to reclaim a little more land, to add something to the extent and the solidity of our possessions.
Learn what is true in order to do what is right.
The most considerable difference I note among men is not in their readiness to fall into error, but in their readiness to acknowledge these inevitable lapses.