The objects with which men in the different professions and states of life are conversant, being very different, and habituating them to very different passions, naturally form in them very different characters and manners. We expect in each rank and profession, a degree of those manners, which, experience has taught us, belong to it. But as in each species of things, we are particularly pleased with the middle conformation, which, in every part and feature, agrees most exactly with the general standard which nature seems to have established for things of that kind; so in each rank, or, if I may say so, in each species of men, we are particularly pleased, if they have neither too much, nor too little of the character which usually accompanies their particular condition and situation. A man, we say, should look like his trade and profession; yet the pedantry of every profession is disagreeable. The different periods of life have, for the same reason, different manners assigned to them. We expect in old age, that gravity and sedateness which its infirmities, its long experience, and its worn-out sensibility seem to render both natural and respectable; and we lay our account to find in youth that sensibility, that gaiety and sprightly vivacity which experience teaches us to expect from the lively impressions that all interesting objects are apt to make upon the tender and unpractised senses of that early period of life. Each of those two ages, however, may easily have too much of these peculiarities which belong to it. The flirting levity of youth, and the immovable insensibility of old age, are equally disagreeable. The young, according to the common saying, are most agreeable when in their behaviour there is something of the manners of the old, and the old, when they retain something of the gaiety of the young. Either of them, however, may easily have too much of the manners of the other. The extreme coldness, and the dull formality, which are pardoned in old age, make youth ridiculous. The levity, the carelessness, and the vanity, which are indulged in youth, will render old age contemptible.