Śrīla Prabhupāda explains that the most important instruction – the most important instruction – given by the Spiritual Master, is to chant the Holy Name of the Lord. There is no other instruction which is as important as that instruction! All the profound secrets of Kṛṣṇa consciousness and devotional service can be revealed through faithful chanting of the Holy Name of the Lord!
MKV, Vol 8- Pg 18, Our Progress in Life is Gauged by Our Chanting- May 01, 2001-Moscow