I can think of no greater expression of defeatism.

我想，这是我听到最悲失败主义论调了。

I'm haunted with gloomy thoughts and sad memories.

我常为悲想和悲痛追念所困扰。

She takes a gloomy view of the future.

她对将来很悲。

He displayed his usual pessimism.

他流出惯有悲。

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

未逾四十八岁悲主义者，是知多之人；而年逾四十八岁乐主义者，是知少之人。