All the performances of human art, at which we look with praise or wonder, are instances of the resistless force of perseverance: it is by this that the quarry becomes a pyramid, and that distant countries are united with canals. If a man was to compare the effect of a single stroke of the pick-axe, or of one impression of the spade, with the general design and last result, he would be overwhelmed by the sense of their disproportion; yet those petty operations, incessantly continued, in time surmount the greatest difficulties, and mountains are levelled, and oceans bounded, by the slender force of human beings. It is therefore of the utmost importance that those, who have any intention of deviating from the beaten roads of life, and acquiring a reputation superior to names hourly swept away by time among the refuse of fame, should add to their reason, and their spirit, the power of persisting in their purposes; acquire the art of sapping what they cannot batter, and the habit of vanquishing obstinate resistance by obstinate attacks. The student who would build his knowledge on solid foundations, and proceed by just degrees to the pinnacles of truth, is directed by the great philosopher of France to begin by doubting of his own existence. In like manner, whoever would complete any arduous and intricate enterprise, should, as soon as his imagination can cool after the first blaze of hope, place before his own eyes every possible embarrassment that may retard or defeat him. He should first question the probability of success, and then endeavour to remove the objections that he has raised. It is proper, says old Markham[43], to exercise your horse on the more inconvenient side of the course, that if he should, in the race, be forced upon it, he may not be discouraged; and Horace advises his poetical friend to consider every day as the last which he shall enjoy, because that will always give pleasure which we receive beyond our hopes. If we alarm ourselves beforehand with more difficulties than we really find, we shall be animated by unexpected facility with double spirit; and if we find our cautions and fears justified by the consequence, there will however happen nothing against which provision has not been made, no sudden shock will be received, nor will the main scheme be disconcerted.