Between you and existence, the last barrier is going to be the master. And Buddha is absolutely right, "Don't think even for a single moment. If you meet me on the way, immediately cut off my head. Once I am removed from your way, you have found your home."
The master is a device himself. First to help you un-cling to other things - money, power, prestige; and then finally to help you with the final un-clinging, to the master himself. And you will be immensely grateful that the master did not block the way.
This is the only criterion whether the master is real, authentic - or phony. The phony master will try to make you go on clinging to him. Your clinging to the master gives him his ego nourishment. Only the authentic master can help you be free of him.