“In the languor of disease and the weariness of old age, the pleasures of the vain and empty distinctions of greatness disappear. To one, in this situation, they are no longer capable of recommending those toilsome pursuits in which they had formerly engaged him. In his heart he curses ambition, and vainly regrets the ease and the indolence of youth, pleasures which are fled for ever, and which he has foolishly sacrificed for what, when he has got it, can afford him no real satisfaction. In this miserable aspect does greatness appear to every man when reduced either by spleen or disease to observe with attention his own situation, and to consider what it is that is really wanting to his happiness. Power and riches appear then to be, what they are, enormous and operose machines contrived to produce a few trifling conveniencies to the body, consisting of springs the most nice and delicate, which must be kept in order with the most anxious attention, and which, in spite of all our care, are ready every moment to burst into pieces, and to crush in their ruins their unfortunate possessor. …
But though this splenetic philosophy, which in time of sickness or low spirits is familiar to every man, thus entirely depreciates those great objects of human desire, when in better health and in better humour, we never fail to regard them under a more agreeable aspect. Our imagination, which in pain and sorrow seems to be confined and cooped up within our own persons, in times of ease and prosperity expands itself to every thing around us. We are then charmed with the beauty of that accommodation which reigns in the palaces and economy of the great; and admire how every thing is adapted to promote their ease, to prevent their wants, to gratify their wishes, and to amuse and entertain their most frivolous desires. If we consider the real satisfaction which all these things are capable of affording, by itself and separated from the beauty of that arrangement which is fitted to promote it, it will always appear in the highest degree contemptible and trifling. But we rarely view it in this abstract and philosophical light. We naturally confound it, in our imagination with the order, the regular and harmonious movement of the system, the machine or economy by means of which it is produced. The pleasures of wealth and greatness, when considered in this complex view, strike the imagination as something grand, and beautiful, and noble, of which the attainment is well worth all the toil and anxiety which we are so apt to bestow upon it.
And it is well that nature imposes upon us in this manner. It is this deception which rouses and keeps in continual motion the industry of mankind.”

Chap. I.
The Theory of Moral Sentiments (1759), Part IV