One can only apporach Krsna by Balarama's grace

Baladeva acts as the spiritual master of all devotees, and by His causeless mercy the fallen souls are delivered. Sri Baladeva appeared as Sri Nityananda Prabhu during the advent of Lord Caitanya and the great Lord Nityananda Prabhu exhibited His causeless mercy by delivering a pair of extremely fallen souls, namely Jagai and Madhai.

By His divine grace only one can approach the Supreme Lord Sri Krsna.

(SB 1.14.28-29 - Purport)