Lord Balarama infuses one with spiritual strength to overcome the obstacles of material life. He gives that strength to those who always strive to achieve Him by the right means. He does not give strength to those whose austerities are inappropriate and to those who are wild and careless. We see many people willing to undergo so many personal inconveniences for fruitive (material) gain. These are inappropriate austerities. Those who are wild and careless are those who perform these austerities and do not make any effort to remember the Lord. They are careless in the application of their austerities, and they are not fixed in the goal. The result is that such persons will never enter the spiritual world and will never perceive the Lord.
LFD Vol 3,Spiritual Strength Pg 135, 1st paragraph