it is not enough to just have bodhicitta. What can we learn from a teacher of excellent character yet poor knowledge? By the same token, the master may be as kind and loving as the buddhas and bodhisattvas, but lack what we need the most, the wisdom for enlightenment. How can we attain any wisdom if the master has none? So, on the basis of having uncontrived bodhicitta, a Mahayana master must, to a certain extent, be adept in both the sutric and tantric teachings and in particular possess knowledge of the actual practice that we need. A person without bodhicitta and wisdom may be a glib talker and a smooth operator, but is actually more concerned with his or her personal benefit than that of others. Such a person will likely use us for personal gain. Any conflict that arises, if not handled well, can create a lot of problems. In this case, it is best not to follow such a person.

~Depicted from GATEWAY TO VAJRAYANA PATH - Vajra Master and Empowerment