Even Jibreel, peace be upon him, was not able to know it, because he said [on the night of the 'Isra wal Mi'eraj] "I cannot move beyond my level", when the Prophet, alaihi Salaat, asked him to continue with him. "If I go further, I will be burnt", Jibreel said.
Sufi Masters say that Jibreel, peace be upon him, should have moved forward with the Prophet, peace be upon him, even if he was going to be burnt. The Prophet told Jibreel, "I am going to move higher even if I am going to be burnt." He was ready to sacrifice himself to obtain that Light for his Community (Ummah), saying:- 'I have no concern for myself'...therefore he moved forward, constantly progressing, traveling to that level, closer and closer to his Lord.. Sallallahu alaihi Wasallam.