Only by finding your previous shortcomings can you surpass yourself now. As the saying goes, "review the past and learn new things, and you can be a teacher." This may be the signature of WeChat written by him, urging himself to work hard and make himself what he wants to be. This diligent boy is very attractive. He is describing his future step by step and writing his brilliant life one by one. I believe that he will succeed one day.
Related sentences include: look back and go further. Tomorrow is safe, no one can allow it. Follow the high wind and the meteor is behind you.