The student must have a very humble state of mind and also must be very inquisitive.
When the teacher, the spiritual master, is praying for the mercy of the Lord to enlighten the student, then by the blessings of the Lord the student gets the blessing of knowledge.
Humility means one does not impose his conceptions upon others and he is fully dependent on the mercy of the Lord.
The spiritual master can instruct the disciple though many different formats.
In the Bhagavat culture worship of the spiritual master plays a very important role in our life.