M mantra still has same effect when chanted silently in the mind. Same sound vibrates internally in your mind. Even mantra, even sound will take you to brahman. Stola susma karna vilashana bramma is a phrase used in bedanta. After repeating the lord's names, shardad masharda said, what else in spiritual life before praying to the master?
Swami Sarvapriyananda teaches Chapter 7 (Verses 13-16) of the Bhagavad Gita. In this series of talks, Swami Sarvapriyananda unfolds the highest truths of Vedanta through the study of the Bhagavad Gita (The Song of God).