[Footnote 1319: Coleridge's advice to his young friends was much to the same effect. "With the exception of one extraordinary man," he says, "I have never known an individual, least of all an individual of genius, healthy or happy without a profession: i.e., some regular employment which does not depend on the will of the moment, and which can be carried on so far mechanically, that an average quantum only of health, spirits, and intellectual exertion are requisite to its faithful discharge. Three hours of leisure, unalloyed by any alien anxiety, and looked forward to with delight as a change and recreation, will suffice to realise in literature a larger product of what is truly genial, than weeks of compulsion.... If facts are required to prove the possibility of combining weighty performances in literature with full and independent employment, the works of Cicero and Xenophon, among the ancients--of Sir Thomas More, Bacon, Baxter, or [13to refer at once to later and contemporary instances] Darwin and Roscoe, are at once decisive of the question."--BIOGRAPHIA LITERARIA, Chap. xi.] [Footnote 1320: Mr. Ricardo published his celebrated 'Theory of Rent,' at the urgent recommendation of James Mill [13like his son, a chief clerk in the India House], author of the 'History of British India.' When the 'Theory of Rent' was written, Ricardo was so dissatisfied with it that he wished to burn it; but Mr. Mill urged him to publish it, and the book was a great success.] [Footnote 1321: The late Sir John Lubbock, his father, was also eminent as a mathematician and astronomer.] [Footnote 1322: Thales, once inveighing in discourse against the pains and care men put themselves to, to become rich, was answered by one in the company that he did like the fox, who found fault with what he could not obtain. Thereupon Thales had a mind, for the jest's sake, to show them the contrary; and having upon this occasion for once made a muster of all his wits, wholly to employ them in the service of profit, he set a traffic on foot, which in one year brought him in so great riches, that the most experienced in that trade could hardly in their whole lives, with all their industry, have raked so much together. --Montaignes ESSAYS, Book I., chap. 24.] [Footnote 1323: "The understanding," says Mr. Bailey, "that is accustomed to pursue a regular and connected train of ideas, becomes in some measure incapacitated for those quick and versatile movements which are learnt in the commerce of the world, and are indispensable to those who act a part in it. Deep thinking and practical talents require indeed habits of mind so essentially dissimilar, that while a man is striving after the one, he will be unavoidably in danger of losing the other." "Thence," he adds, "do we so often find men, who are 'giants in the closet,' prove but 'children in the world.'"--'Essays on the Formation and Publication of Opinions,' pp.251-3.]