It is not necessary to change our road in order to advance on our journey. We should cultivate the spot of ground we possess, to the utmost of our power, though it may be circumscribed and comparatively barren. _A rolling stone gathers no moss._ People may collect all the wisdom they will ever attain, quite as well by staying at home as by travelling abroad. There is no use in shifting from place to place, from side to side, or from subject to subject. You have always to begin again, and never finish any course of study or observation. By adhering to the same principles you do not become stationary. You enlarge, correct, and consolidate your reasonings, without contradicting and shuffling about in your conclusions. If truth consisted in hasty assumptions and petulant contradictions, there might be some ground for this whiffling and violent inconsistency. But the face of truth, like that of nature, is different and the same. The first outline of an opinion, and the general tone of thinking, may be sound and correct, though we may spend any quantity of time and pains in working up and uniting the parts at subsequent sittings. If we have misconceived the character of the countenance altogether at first, no alterations will bring it right afterwards. Those who mistake white for black in the first instance, may as well mistake black for white when they reverse their canvas. I do not see what security they can have in their present opinions, who build their pretensions to wisdom on the total folly, rashness, and extravagance (to say no worse) of their former ones. The perspective may change with years and experience: we may see certain things nearer, and others more remote; but the great masses and landmarks will remain, though thrown into shadow and tinged by the intervening atmosphere: so the laws of the understanding, the truth of nature, will remain, and cannot be thrown into utter confusion and perplexity by our blunders or caprice, like the objects in Hogarth's _Rules of Perspective_, where everything is turned upside down, or thrust out of its well-known place. I cannot understand how our political Harlequins feel after all their summersaults and metamorphoses. They can hardly, I should think, look at themselves in the glass, or walk across the room without stumbling. This at least would be the case if they had the least reflection or self-knowledge. But they judge from pique and vanity solely. There should be a certain decorum in life, as in a picture, without which it is neither useful nor agreeable. If my opinions are not right, at any rate they are the best I have been able to form, and better than any others I could take up at random, or out of perversity, now. Contrary opinions vitiate one another, and destroy the simplicity and clearness of the mind: nothing is good that has not a beginning, a middle, and an end; and I would wish my thoughts to be 'Linked each to each by natural piety.' 1821. ESSAY XI