There is but a very minute portion of the creation which we can turn into food and clothes, or gratification for the body; but the whole creation may… - William Ellery Channing

Intellectual culture consists, not chiefly, as many are apt to think, in accumulating information, though this is important, but in building up a force of thought which may be turned at will on any subjects on which we are called to pass judgment. This force is manifested in the concentration of the attention, in accurate, penetrating observation, in reducing complex subjects to their elements, in diving beneath the effect to the cause, in detecting the more subtle differences and resemblances of things, in reading the future in the present, and especially in rising from particular facts to general laws or universal truths. ... Oone man talks continually about the particular actions of this or another neighbor; whilst another looks beyond the acts to the inward principle from which they spring, and gathers from them larger views of human nature.

Whoever desires that his intellect may grow up to soundness, to healthy vigor, must begin with moral discipline. Reading and study are not enough to perfect the power of thought. One thing above all is needful, and that is, the disinterestedness which is the very soul of virtue. To gain truth, which is the great object of the understanding, I must seek it disinterestedly. Here is the first and grand condition of intellectual progress. I must choose to receive the truth, no matter how it bears on myself. I must follow it, no matter where it leads, what interests it opposes, to what persecution or loss it lays me open, from what party it severs me, or to what party it allies. Without this fairness of mind, which is only another phrase for disinterested love of truth, great native powers of understanding are perverted and led astray.

I have chosen for the subject of this lecture Self-culture, or the care which every man owes to himself, to the unfolding and perfecting of his nature.