In the official history of the Three Kingdoms, Sima Yi has two most famous comments about Zhuge Liang: In the first sentence, Sima Yi said that Zhuge Liang: "He is really a genius in the world!"
The second sentence, Sima Yi said of Zhuge Liang: "He is ambitious but fails to see opportunities, has many plans but few decisions, is a good soldier but has no power." It means being indecisive and not knowing how to adapt!
In fact, the second sentence is Sima Yi’s comprehensive evaluation of Zhuge Liang.