There are times when the assertion of great principles is the best service a man can render society. The present is a moment of bewildering excitement, when men's minds are stormed and darkened by strong passions and fierce conflicts; and also a moment of absorbing worldliness, when the moral law is made to bow to expediency, and its high and strict requirements are denied, or dismissed as metaphysical abstractions or impracticable theories. At such a season, to utter great principles without passion, and in the spirit of unfeigned and universal good-will, and to engrave them deeply and durably on men's minds, is to do more for the world, than to open mines of wealth, or to frame the most successful schemes of policy.

Slavery (1835)