It is a common rule with primitive people not to waken a sleeper, because his soul is away and might not have time to get back.

Hence the strong attraction which magic and science alike have exercised on the human mind; hence the powerful stimulus that both have given to the pursuit of knowledge. They lure the weary enquirer, the footsore seeker, on through the wilderness of disappointment in the present by their endless promises of the future: they take him up to the top of an exceeding high mountain and show him, beyond the dark clouds and rolling mists at his feet, a vision of the celestial city, far off, it may be, but radiant with unearthly splendour, bathed in the light of dreams.

The awe and dread with which the untutored savage contemplates his mother-in-law are amongst the most familiar facts of anthropology.

Even the recognition of an individual whom we see every day is only possible as the result of an abstract idea of him formed by generalization from his appearances in the past.

The man of science, like the man of letters, is too apt to view mankind only in the abstract, selecting in his consideration only a single side of our complex and many-sided being.

The moral world is as little exempt as the physical world from the law of ceaseless change, of perpetual flux.

The world cannot live at the level of its great men.