Sri Swami Vishwananda talks about Chaitanya

There was a saint called Chaitanya Das Maharaj who lived in the 17th century. He was always singing Gauranga, Gauranga - all the time. Even while he was sleeping, people would just hear 'Gauranga, Gauranga, Gauranga, Gauranga' vibrating from him. Each breath of him changed to Gauranga and he rised in such a divine, spiritual advancement, that even when he died, when he took Samadhi, his whole body was vibrating Gauranga, Gauranga. Gauranga is another aspect of Krishna, who appeared 1500. So just by chanting you are making proper use of your tongue, by reciting the name of God and also you are utilizing the hearing, which will become more fine till you realize the vibration within yourself. So this will lead you to self-realization or God-realization and to attain the love of God completely.