Generally, when we write letters, we write on the top, `All Glory to Sri Guru and Gauranga', to pray for the grace of Sri Guru and Gauranga. But Srimad Bhakti Siddantha Saraswati Goswami Thakur, in his commentary of the first verse of Shikshashtaka, without writing `All Glory to Sri Guru and Gauranga', commenced his writing on the top, `Sri Krishna Kirtanaya Namah' - All Glory to Sri Krishna sankirtankari Gurudeva - invoking the grace of Gurudeva, Who is competent to sing the glories of Sri Krishna, All Glory to Sri Chaitanya Mahaprabhu, Who has appeared as sankirtan vigraha (the Holy embodiment of Sri Krishna sankirtan).

We generally bow down to a person. Why is Srila Bhakti Siddhanta Saraswati Goswami Thakur bowing down to Krishna kirtan? Because according to him, `Krishna kirtan' and `Krishna' are identical. You are to understand the difference between material sound and transcendental spiritual sound. In material sound, the sound word is different from the thing indicated by it. But transcendental sound is non-different from the thing indicated by it. The sound ‘water’ is different from the thing `water', but the Name of Krishna and the Supreme Lord Sri Krishna are non-different. There is no material barrier between the Name of God and the named God. nama cintanami krishna caitanya-rasa-vigrahah - Padma Purana. The Holy Name is cintamani, which signifies the Name can fulfil all desires, but we should not have mundane desires while doing it.