Before you are in your thirties, you should spare no effort to do the additions, for you can never predict your own potentials if you do not give it a go.

30歲之前，玩命做加法，你想象不到你會有多少種可能，不試你怎么知道呢？

After you are in your thirties, you’d better do subtractions.

30歲之后，做減法。

You are not fit for all things. Besides, you don’t have to do all things that suit you.?

你不是所有的都適合，也不是適合你的你都該去做。