As we all know, Guo Jia was Cao Cao's most trusted and important adviser in the early days, and it was with his help that Cao Cao dominated the Central Plains.
Guo Jia is not only resourceful, but also extremely discerning, and the master who first followed him was Yuan Shao, because he saw that Yuan Shao had no ambitions and was blind, so he chose to leave Yuan Shao and return to the mountains. It was not until 6 years later, in the first year of Jian'an (196 AD), after the death of Cao Cao's then-important strategist Xi Zhicai, that he came to Cao Ying on the recommendation of his friend Xun Yu.
After that, Guo Jia gained cao Cao's favor and became his first counselor. And Guo Jia did not disappoint Cao Cao, speaking with performance,
。 Before the Battle of Guandu, because the Yuan army was strong and the Cao army generally lacked confidence, at the critical moment, Guo Jia put forward the "theory of ten victories and ten defeats", which effectively boosted the morale of the Cao army. Subsequently, cao Cao defeated Yuan Shao at the Battle of Guandu, laying a good foundation for the unification of the north.
At the same time, he is very good at "mind reading". In the third year of Jian'an (198), when Liu Bei was "attached" to Cao Cao because of his defeat at Lü Bu, Cao Cao used him heavily, but Guo Jia poured cold water on Cao Cao and said that he would "put" Liu Bei under house arrest, otherwise he would leave a great disaster when the tiger returned to the mountain.
This time did not attract Cao Cao's attention, and as a result, Liu Bei seized the opportunity to escape, and then established the State of Shu, which became the biggest hidden danger of the State of Wei
In addition, Guo Jia successfully predicted the assassination and death of Sun Ce. In short, Guo Jia's planning, talent, divination, and appearance are all omnipotent, of course, and even have such a saying: "Guo Jia does not die, and the dragon does not come out!" ”。
Of course, Guo Jia eventually died on the way back with Cao Cao's triumphant return to Wuhuan, which was a pity.
It is reported that when Guo Jia was dying, his last words to Cao Cao were: "Sima Yi will rebel in the future." "The reason is that Sima Yi has the appearance of a wolf and the heart of a tiger and a bear, and the minister has long noticed that his heart is different, and he hopes that the minister will suppress this person and prevent him from rebelling, and it is best to kill him."
So, how did Guo Jia see that Sima Yi had the "wolf gu zhixiang" and "anti-bone" and would rebel?
Legend has it that Guo Jia once had a dream of three horses grazing in a manger. Afterwards, I broke out in a cold sweat. Although he did not guess the three horses, it referred to Sima Yi, Sima Zhao, and Sima Yan. However, he guessed that the "horse" referred to in the dream referred to the Sima family, and the horse grazing was sima Yi wanting to oppose Cao Wei.
Why did Guo Jia think of Sima Yi so soon? The reason is simple.
Sima Yi belonged to the "other" people in Cao Ying, and he was summoned by Cao Cao several times before he had no choice but to go down the mountain. In his daily work, although Sima Yi was diligent in his duties and did not laugh harshly, his scheming and hypocrisy failed to escape Guo Jia's insight. Coupled with the dream he had, he was even more certain that Sima Yi would be a chaotic Wei element in the future. In Guo Jia's eyes, he hoped that Cao Cao would rather kill Sima Yi by mistake than let it go.
Therefore, the loyal Guo Jia reminded and warned Cao Cao to beware of Sima Yi before his death.
Unfortunately, although Cao Cao regarded Guo Jia as a "confidant", he was suspicious by nature, coupled with a unique and dedicated personality, so he did not take Guo Jia's "golden words out of the mountains" at the beginning, "house arrest" Liu Bei, so that Liu Bei, who let the tiger return to the mountains, eventually dominate in Shuchuan, thus creating a pattern of three worlds. In the end, he did not listen to Guo Jia's dying words, removed sima Yi, a potential scourge, and finally buried Cao Weijiangshan.
After Guo Jia's death, Cao Cao was devastated on the one hand, and on the other hand, he wanted to get rid of Sima Yi. However, sima Yi, who was wise at that time, helped Cao Pi win the throne, and Cao Pi, who was grateful for the reward, tried his best to intercede for Sima Yi. In the end, Cao Cao did not directly kill Sima Yi, but only warned Cao Pi to beware of Sima Yi in the future.
As a result, after Cao Cao's death, Cao Pi reused Sima Yi after succeeding to the throne. Eventually, the Sima family gradually overshadowed the Cao Wei regime, and also launched the Gaopingling Rebellion, which from then on took charge of the imperial government, and in the hands of Sima Yi's grandson Sima Yan, he finally returned the Three Kingdoms to Jin.