When Socrates was about 30, and his father was long dead, he was still pursuing the art of sculpture, but from necessity, and without much inclination. ↗
Travel, which was once either a necessity or an adventure, has become very largely a commodity, and from all sides we are persuaded into thinking that it is a social requirement, too. ↗
The powers, aspirations, and mission of man are such as to raise the study of his origin and nature, inevitably and by the very necessity of the case, from the mere physiological to the psychological stage of scientific operations. ↗