Therefore, the first sentence should be viewed separately, Zhuge Liang/carelessness/loss of Jingzhou, while the second sentence is preceded by "now", indicating that the first sentence is a summary of the past. It should be said that you have your own unique thinking, but you are very careless and you have lost something important. Maybe you don't know. Although the process of losing that thing has nothing to do with you, God will not give an absent-minded person a good result casually.
The second sentence shows that there is a good start at this time, there is a good start, you can start, and you need to work hard to succeed.