In all creatures, that prey not upon others, and are not agitated with violent passions, there appears a remarkable desire of company, which associates them together, without any advantages they can ever propose to reap from their union. This is still more conspicuous in man, as being the creature of the universe, who has the most ardent desire of society, and is fitted for it by the most advantages. We can form no wish, which has not a reference to society. A perfect solitude is, perhaps, the greatest punishment we can suffer. Every pleasure languishes when enjoy’d a-part from company, and every pain becomes more cruel and intolerable. Whatever other passions we may be actuated by; pride, ambition, avarice, curiosity, revenge or lust; the soul or animating principle of them all is sympathy, nor wou’d they have any force, were we to abstract entirely from the thoughts and sentiments of others. Let all the powers and elements of nature conspire to serve and obey one man: Let the sun rise and set at his command: The sea and rivers roll as he pleases, and the earth furnish spontaneously whatever may be useful or agreeable to him: He will still be miserable, till you give him some one person at least, with whom he may share his happiness, and whose esteem and friendship he may enjoy.In his An Enquiry Concerning the Principles of Morals, Hume makes the point that a solitary life can be devoid enjoyment:
Reduce a person to solitude, and he loses all enjoyment, except either of the sensual or speculative kind; and that because the movements of his heart are not forwarded by correspondent movements in his fellow-creatures. The signs of sorrow and mourning, though arbitrary, affect us with melancholy; but the natural symptoms, tears and cries and groans, never fail to infuse compassion and uneasiness.