An Enquiry Concerning the Principles of Morals

Whoever has passed an evening with serious melancholy people, and has observed how suddenly the conversation was animated, and what sprightliness diffused itself over the countenance, discourse, and behaviour of every one, on the accession of a good-humoured, lively companion; such a one will easily allow that cheerfulness carries great merit with it, and naturally conciliates the good-will of mankind. No quality, indeed, more readily communicates itself to all around; because no one has a greater propensity to display itself, in jovial talk and pleasant entertainment. The flame spreads through the whole circle; and the most sullen and morose are often caught by it.

That the melancholy hate the merry, even though Horace says it, I have some difficulty to allow; because I have always observed that, where the jollity is moderate and decent, serious people are so much the more delighted, as it dissipates the gloom with which they are commonly oppressed, and gives them an unusual enjoyment.