I can think of no greater expression of defeatism.

我想，这是我听到的最悲观的失败主义。

I'm haunted with gloomy thoughts and sad memories.

我常为悲观的思想和悲痛的追念所困扰。

She takes a gloomy view of the future.

她对将来很悲观的。

He displayed his usual pessimism.

他流出惯有的悲观。

The man who is a pessimist before forty-eight knows too much; the man who is an optimist after forty-eight knows too little.

未十八岁的悲观主义者，是知道得太多之人；而十八岁的乐观主义者，是知道得太少之人。