shivam suryawanshi's Key Ideas from Learned Optimism
by Martin E. P. Seligman

Optimists see problems as specific to a situation, pessimists make them a general case. Being on a team assignment where one person doesn’t deliver their part, a pessimist is likely to say: “This team sucks.” and write off the entire team as lazy. An optimist would say: “One person is not very helpful, but I’m sure the rest of the team will do great work.”