Sun Bin used the strategy of "encircling Wei to save Zhao" twice. Why did Pang Juan fall for it twice?

Sun Bin, as a famous strategist in the Warring States Period, was one of the ancient famous soldiers who pursued titles in the Tang and Song Dynasties. And two fights between him and his brother Pang Juan? Encircle Wei to save Zhao? And Pang Juan was fooled twice, mainly because he caught Pang Juan's characteristics of being utilitarian, arrogant and self-righteous.

Sun Bin and Pang Juan are both disciples of Guiguzi. Guiguzi is known as the sage of the art of war, the ancestor of military strategists, the ancestor of fortune-telling and divination, and the ancestor of Wang Chan, which shows his superb skills. Pang Juan went down the mountain first and became a general in Wei. He knew that he was not as good as Sun Bin, and he was afraid that Sun Bin would be better than himself in the future, so he sent him to Wei, and then fabricated charges and cruelly cut off Sun Bin's foot. Fortunately, he saved his life and was secretly transported back to Qi by an envoy of Qi State, which was appreciated by Tian Ji. ?

In 354 BC, Zhao attacked Wei, which was countered by his ally Wei, and the capital was besieged. Zhao called for help, and sent Sun Bin and Tian Ji to help. Sun Bin thought Wei's domestic defense was empty, so he adopted it? Encircle Wei to save Zhao? Strategy, feint Wei, with a small number of troops as bait to deliberately show weakness, so that Pang Juan, eager to make achievements, lost the trench and pursued lightly, and finally entered an ambush in Guiling, and Pang Juan was defeated. This time, Pang Juan was easily fooled because he was blinded by utilitarianism.

Through the mediation of various countries, Pang Juan was released back to Wei. In 342 BC, South Korea was about to be destroyed by Wei, and Qi once again sent Tian Ji and Sun Bin to help South Korea. Sun Bin adopted again? Encircle Wei to save Zhao? Law, don't go to Qi, go directly to Wei. Pang Juan, which has been steadily advancing step by step, has fallen into Sun Bin's plan to reduce stoves. When he saw that the stoves cooked by the Qi army were getting less and less every day, he thought that there were a large number of deserters in the Qi army. May also be unable to resist the excitement of defeating Sun Bin, so he left the infantry to chase the cavalry, entered the ambush circle in Sun Bin in the narrow terrain of Maling, and drew his sword to commit suicide when he knew that the defeat was set.

It stands to reason that Pang Juan, as an apprentice of Guiguzi, should not be so bad. This should be because he was so jealous that he wanted to compare Sun Bin with the past that he lost his mind twice.