Well, aren't we Mr " The glass is half empty."

恩，非要这么光往坏处想吗？

We have an expression, " They always think the glass is half empty" .

我们有一个表达，“他们总是认为杯子是半空的”。

Pessimistic means that the glass is half empty. The glass is not half full.

悲观意味着杯子是半空的。玻璃杯没有半满。