The Supreme Lord reveals Himself to those who are always endeavoring to achieve Him by the right means. Only such persons enter into the spiritual world. We must make the endeavor, and by so doing, we will also be bestowed with the strength to overcome difficulties. Srila Bhaktivinoda Thakura says that before one chants the holy name of the Lord by his own endeavors, he must pray to the Lord to overcome these different obstacles in chanting His holy name. First these demons have to be fought by our own endeavors and then Lord Balarama comes and gives us strength and helps us to overcome them. Thus we must endeavor.
LFD Vol 3,Spiritual Strength Pg 132, 3rd last paragraph onwards