Man...is a tame or civilized animal; never the less, he requires proper instruction and a fortunate nature, and then of all animals he becomes the most divine and most civilized; but if he be insufficiently or ill- educated he is the most savage of earthly creatures.
I could not rest, Watson, I could not sit quiet in my chair, if I thought that such a man as Professor Moriarty were walking the streets of London unchallenged.
It is most important to allow the brain the full measure of sleep which is required to restore it; for sleep is to a man's whole nature what winding up is to a clock.
IMMORAL, adj. Inexpedient. Whatever in the long run and with regard to the greater number of instances men find to be generally inexpedient comes to be considered wrong, wicked, immoral.
Ingratitude is surely the chief of the intellectual sins of man. He takes his political benefits for granted, just as he takes the skies and the seasons for granted.
The three great problems of this century; the degradation of man in the proletariat, the subjection of women through hunger, the atrophy of the child by darkness.