In science the important thing is to modify and change one's ideas as science advances.

The most important attribute of man as a moral being is the faculty of self-control.

Even the absurdest report may in nearly every instance be traced to an actual occurrence; and had there been no such actual occurrence, this preposterous misrepresentation of it would never have existed. Though the distorted or magnified image transmitted to us through the refracting medium of rumour, is utterly unlike the reality; yet in the absence of the reality there would have been no distorted or magnified image.

In the supremacy of self-control consists one of the perfections of the ideal man.

Of all the knowledge, that most worth having is knowledge about health! The first requisite of a good life is to be a healthy person.

The "Creed of Christendom" is alien to my nature, both emotional and intellectual.

Mental power cannot be got from ill-fed brains.