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. Iha haite sarva siddhi haibe tomara [Caitanya-bhagavata Madhya 23.78]. 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.
From The Path of Perfection by Srila Prabhupada