This is a saying by Mr. Lu Xun. It means that a person's success requires more than just a wise mind. The key is to be diligent. The original words and explanation are as follows:

1 , Original words:

Where is the genius? I just spend the time other people drink coffee writing.

2. Explanation:

There is no genius in the world. The reason why I have achieved some achievements in writing is because I spent other people’s entertainment time on writing.

It means that redoubling efforts and diligence will create talents.