It sounds paradoxical to say the attainment of scientific truth has been effected, to a great extent, by the help of scientific errors.

Education is the instruction of the intellect in the laws of Nature.

The dogma of the infallibility of the Bible is no more self-evident than is that of the infallibility of the popes.

The more rapidly truth is spread among mankind the better it will be for them. Only let us be sure that it is the truth.

Regarded anatomically, the resemblances between the foot of Man and the foot of the Gorilla are far more striking and important than the differences... be the differences between the hand and foot of Man and those of the Gorilla what they may the differences between those of the Gorilla and those of the lower Apes are much greater.

Within the last fifty years, the extraordinary growth of every department of physical science has spread among us mental food of so nutritious and stimulating a character that a new ecdysis seems imminent.

Creation,' in the ordinary sense of the word, is perfectly conceivable. I find no difficulty in conceiving that, at some former period, this universe was not in existence, and that it made its appearance in six days (or instantaneously, if that is preferred), in consequence of the volition of some preexisting Being.