Reason:

First of all, "1% inspiration" in this sentence points out the importance of one's own talent, and all efforts the day after tomorrow should be based on this inspiration and work hard for it.

Secondly, "99% sweat" shows the importance of hard work the day after tomorrow. A talented person can't succeed if he doesn't make enough efforts. Success must come out step by step.

To sum up, only by doing things that are in line with one's talents, coupled with diligence, can one have the greatest possibility of success.