By chanting, the process of yoga−mind and sense control−becomes perfected:
Yoga means training the mind and the senses to be fixed on the Self. This is not possible by meditating only fifteen minutes a day and then going out and doing whatever the senses dictate. How can the problems of life be solved so cheaply? If we want something precious, we have to pay for it. By the grace of Lord Caitanya, this payment has been made very easy−just chant Hare Krsna. By your chanting, this system of control, this yoga system, becomes perfected. Éha haite sarva siddhi haibe tomara. Thus Lord Caitanya has blessed us. Simply by chanting Hare Krsna, we will achieve the perfection of self−realization. In this age of Kali−yuga, when people are so fallen, other processes will not be successful. This is the only process, and it is easy, sublime, effective, and practical. By it, one can realize oneself.
¯The Path of Perfection
Because chanting Hare Krsna fixes the mind on Krsna, success in yoga is immediately attained by chanting: "For the mind is restless, turbulent, obstinate, and very strong, O Krsna, and to subdue it is, it seems to me, more difficult than controlling the wind." (Bhagavad−gita As It Is 6.34) By chanting Hare Krsna, one captures the mind immediately. Just by saying the name Krsna and hearing it, the mind is automatically fixed on Krsna. This means that the yoga system is immediately attained. The entire yoga system aims at concentration on the form of Visnu, and Krsna is the original personality from whom all these Visnu forms are expanded... Thus one who concentrates his mind on Lord Sri Krsna, the original Supreme Personality of Godhead, immediately attains the perfection of yoga.
¯The Path of Perfection