We must get sambandha-jnana from our guru if we want lasting shelter under his guidance. Sambandha-jnana is the knowledge and necessary level of faith for establishing our connection with Krishna. Once the connection is established, the guru gradually clears the path towards the goal by keeping the disciple moving in the right direction through his instructions and by providing the disciple strength to overcome obstacles (anarthas).
Collected Letters to Friends and disciples Vol 4, Pg 129, last paragraph.