If you falter in sticking to the universal principle of Satya, Ahimsa and other virtues, any acquisitions of power or authority will be lost at the critical moment. This loss of memory leads to loss of intellect leading finally to ones end.

In Mahabharat, Karna, the son of Kunti is known for his velour, loyalty, charity and many other good qualities. He gains the Brahmastra from his Guru, Parasurama by concealing his identity as a Suta Putra and also lying that he is a brahmin. This falsehood led to the punishment by his Guru that the weapon would be forgotten at the critical moment.

The complacency that may arise due to preliminary accomplishments would lead to loss of memory of the goal and these attainments namely ahimsa, viveka, satya sandhata, may get treated as goals in themselves.

In complacency we forget our goal, the purpose with which we started the life and almost get into a state of moodha, lose our way. Smritibhramshaad buddhinaasho buddhinaashaat pranashyati (Srimad Bhagavad Gita 2-63)

The point to note here, the reason why the link is given to Guru Drohamu (Cell 114) is, when betrayal of the Guru is done by someone, he loses his smriti, he loses his buddhi. He comes to one stage lower. What actually happens when smritibhramshaa happens is, we all know the story of Karna. His guru tells him that at the time of most need he will not recall anything. Karna story is typical example of smritibhramsham and guru drohamu