We seldom find people ungrateful so long as it is thought we can serve them.

We seldom find people ungrateful so long as it is thought we can serve them.

只要人们认为我们能为他们服务，我们就很少发现人们忘恩负义。

-- Francois VI, Duc De La Rochefoucauld 弗朗索瓦六世，罗切福科公爵