Life is like taking an umbrella when it doesn't rain, and forgetting to take an umbrella when it rains. What does this mean?

This sentence means that in life, there are often situations where you prepare something, but you don't need it at last, or you forget to prepare it when you need it. It's like taking an umbrella when it doesn't rain and forgetting to bring it when it rains.

This can happen in many ways, such as:

* Planned things didn't happen, but a lot of time and energy were spent in the planning process.

* prepared a project or exam, but didn't use it or failed in the end.

I bought an item and later found it unnecessary or useless.

* When you are healthy, you don't care about your body, but when you are sick, you regret it.

The moral of this sentence is to remind people to assess the situation, be prepared, don't waste time and resources, and cherish what they have in front of them, and don't wait until they lose it to regret it.