"Enlarge not thy destiny," said the oracle: "endeavor not to do more than is given thee in charge." The one prudence in life is concentration; the one evil is dissipation: and it makes no difference whether our dissipations are coarse or fine; property and its cares, friends, and a social habit, or politics, or music, or feasting. Everything is good which takes away one plaything and delusion more, and drives us home to add one stroke of faithful work. Friends, books, pictures, lower duties, talents, flatteries, hopes,—all are distractions which cause oscillations in our giddy balloon, and make a good poise and a straight course impossible. You must elect your work; you shall take what your brain can, and drop all the rest. Only so, can that amount of vital force accumulate, which can make the step from knowing to doing. No matter how much faculty of idle seeing a man has, the step from knowing to doing is rarely taken. ’Tis a stop out of a chalk circle of imbecility into fruitfulness. Many an artist lacking this, lacks all: he sees the masculine Angelo or Cellini with despair. He, too, is up to Nature and the First Cause in his thought. But the spasm to collect and swing his whole being into one act, he has not. The poet Campbell said, that "a man accustomed to work was equal to any achievement he resolved on, and, that, for himself, necessity not inspiration was the prompter of his muse." Concentration is the secret of strength in politics, in war, in trade, in short, in all management of human affairs. One of the high anecdotes of the world is the reply of Newton to the inquiry, "how he had been able to achieve his discoveries?"—"By always intending my mind." Or if you will have a text from politics, take this from Plutarch: "There was, in the whole city, but one street in which Pericles was ever seen, the street which led to the market-place and the council house. He declined all invitations to banquets, and all gay assemblies and company. During the whole period of his administration, he never dined at the table of a friend." Or if we seek an example from trade,—"I hope," said a good man to Rothschild, "your children are not too fond of money and business: I am sure you would not wish that."—"I am sure I should wish that: I wish them to give mind, soul, heart, and body to business,—that is the way to be happy. It requires a great deal of boldness and a great deal of caution, to make a great fortune, and when you have got it, it requires ten times as much wit to keep it. If I were to listen to all the projects proposed to me, I should ruin myself very soon. Stick to one business, young man. Stick to your brewery, (he said this to young Buxton,) and you will be the great brewer of London. Be brewer, and banker, and merchant, and manufacturer, and you will soon be in the Gazette."