I learnt the hard way that too much optimism is toxic.
Due to my high optimism I got an anxiety attack. It become so bad to the point that I had glimpse of why some people end up taking their life.
Optimism if not controlled will blind us. We will think everything will be okay without having to do anything. We are happy and satisfied most of the time.
We are not actually. We do feel anxious. But we covered it up with optimism. False optimism.
Instead of optimism we should focus on practicality. Practicality involves uncertainty. It might works or it might not.
That gave us a reminder to the work. To try our best but also knowing it might fail. And if failed, its okay. We can try different thing next time.