In the first sentence, wise men are pragmatic, while fools strive for merit. Sima Yi learned this truth from Cao Cao. Cao Cao's "relying on the emperor to make the princes" is a typical pragmatism and does not dispute fame. Sima Yi only became a small official after Cao Pi proclaimed himself emperor, but his power was greater than anyone else.

The second sentence is that an enemy is also a teacher and a friend. At the beginning of Sima Yi's defection to Cao Cao, his greatest political enemy was Yang Xiu, but before Yang Xiu died, he went to be caring and attentive and asked for advice from him, which showed his modesty and prudence.

Personality analysis:

When Sima Yi was alive, he had a high prestige in Wei. Even after Sima Yi's death, Wu Hewen Qin crusaded against Sima Yi, and Sima Yi was still praised as "loyal to the country, Wei Shi, and loyal through events".

History books call it "the world is happy" and "the world is happy". In the early years of the Jin Dynasty, Sima Yan realized the rule of "unlimited people in the world" during the Taikang period, and was known as Sima Yi in Sima Yi, where he became famous in the world.

Sima Yi's personality has its good side and its bad side, but it is undeniable that he has played an indelible role in history and left a rich and colorful stroke.

In fact, for Sima Yi, these two evaluations are not excessive, and they are all part of Sima Yi's character. Everyone is diversified, what's more, as an important figure in the political center of that era, Sima Yi has many personalities, and it is inevitable that different people will adopt different methods in the face of different things.