How Krishna consciousness removes disturbance of the mind…

 Disturbance is due to want of an ultimate goal, and when one is certain that Krishna is the enjoyer, proprietor and friend of everyone and everything, then one can, with a steady mind, bring about peace. Therefore, one who is engaged without a relationship with Krishna is certainly always in distress and is without peace, however much he may make a show of peace and spiritual advancement in life. Krishna consciousness is a self-manifested peaceful condition which can be achieved only in relationship with Krishna.

Bhagavad-gita 2.66 purport