The passions contract and warp the natural progress of life. They paralyse all of it that is not devoted to their tyranny and caprice. This makes the difference between the laughing innocence of childhood, the pleasantness of youth, and the crabbedness of age. A load of cares lies like a weight of guilt upon the mind: so that a man of business often has all the air, the distraction and restlessness and hurry of feeling of a criminal. A knowledge of the world takes away the freedom and simplicity of thought as effectually as the contagion of its example. The artlessness and candour of our early years are open to all impressions alike, because the mind is not clogged and pre-occupied with other objects. Our pleasures and our pains come single, make room for one another, and the spring of the mind is fresh and unbroken, its aspect clear and unsullied. Hence ‘the tear forgot as soon as shed, the sunshine of the breast.’ But as we advance farther, the will gets greater head. We form violent antipathies, and indulge exclusive preferences. We make up our minds to some one thing, and if we cannot have that, will have nothing. We are wedded to opinion, to fancy, to prejudice; which destroys the soundness of our judgments, and the serenity and buoyancy of our feelings. The chain of habit coils itself round the heart, like a serpent, to gnaw and stifle it. It grows rigid and callous; and for the softness and elasticity of childhood, full of proud flesh and obstinate tumours. The violence and perversity of our passions comes in more and more to overlay our natural sensibility and well-grounded affections; and we screw ourselves up to aim only at those things which are neither desirable nor practicable. Thus life passes away in the feverish irritation of pursuit and the certainty of disappointment. By degrees, nothing but this morbid state of feeling satisfies us: and all common pleasures and cheap amusements are sacrificed to the demon of ambition, avarice, or dissipation. The machine is over-wrought: the parching heat of the veins dries up and withers the flowers of Love, Hope, and Joy; and any pause, any release from the rack of ecstacy on which we are stretched, seems more insupportable than the pangs which we endure. We are suspended between tormenting desires, and the horrors of _ennui_. The impulse of the will, like the wheels of a carriage going down hill, becomes too strong for the driver, reason, and cannot be stopped nor kept within bounds. Some idea, some fancy, takes possession of the brain; and however ridiculous, however distressing, however ruinous, haunts us by a sort of fascination through life.