可是这乐观主义说得容易做得难。

This optimism is easier said than done, though.

youdao

因为它说得容易做得难，所以你是不是只经常听到、想到和读到而没有做到？

Could it be that you hear and, perhaps, read about it so often because it's a subject that is easy to know about and difficult to practice?

youdao