Morals were too essential to the happiness of man, to be risked on the uncertain combinations of the head. Nature laid their foundation, therefore, in sentiment, not in science.

The whole commerce between master and slave is a perpetual exercise of the most boisterous passions, the most unremitting despotism on the one part, and degrading submissions on the other. Our children see this, and learn to imitate it.

He who permits himself to tell a lie once, finds it much easier to do it a second and third time, till at length it becomes habitual; he tells lies without attending to it, and truths without the world's believing him. This falsehood of the tongue leads to that of the heart, and in time depraves all its good dispositions.

I consider the government of the United States as interdicted by the Constitution from intermeddling with religious institutions, their doctrines, discipline, or exercises. This results not only from the provision that no law shall be made respecting the establishment or free exercise of religion, but from that also which reserves to the States the powers not delegated to the United States. Certainly, no power to prescribe any religious exercise or to assume authority in any religious discipline has been delegated to the General Government. It must then rest with the States.

I steer my bark with hope in the head, leaving fear astern. My hopes indeed sometimes fail, but not oftener than the forebodings of the gloomy.

Man was destined for society. His morality therefore was to be formed to this object. He was endowed with a sense of right and wrong merely relative to this. This sense is as much a part of his nature as the sense of hearing, seeing, feeling; it is the true foundation of morality... The moral sense, or conscience, is as much a part of man as his leg or arm. It is given to all human beings in a stronger or weaker degree, as force of members is given them in a greater or less degree. It may be strengthened by exercise, as may any particular limb of the body.

As new discoveries are made, new truths discovered and manners and opinions change with the change of circumstances, institutions must advance also to keep pace with the times.