M…was accused of disliking everybody. ‘Not at all,’ he said. ‘I was once on the point of doing so but I took steps to remedy it.’
‘What did you do?’
‘I stopped having anything to do with anybody.’

Chamfort, Chamfort: Reflections on Life, Love & Society, Short Books, 2003.

He who has little communication with people is seldom a misanthrope. True misanthropes are not found in solitude, but in the world. This is because it is practical experience of life, and certainly not philosophy, that makes people hate their fellows. And if someone who is a misanthrope withdraws from society, in his seclusion he loses his misanthropy.

Giacomo Leopardi, Thoughts, 1837, section 89, Hesperus Press Limited, 2002.