In order to establish the principles of Devotional Service in this Age of Discord, the Lord appeared upon the Earth near the close of the Fifteenth Century, in the Form of Lord Chaitanya Mahaprabhu. Sri Chaitanya displayed in Himself the perfection of Krishna Consciousness, and it was He Who urged the singing of the Holy Names of God as the single most effective means for the development of spiritual life in modern times. Because He is a complete incarnation of the Supreme Godhead, Krishna, He is known as Krishna Chaitanya. Sri Nityananda Prabhu is the direct manifestation of the Lord, His eternal Companion, sometimes known as Balarama-Nityananda. Together, these Two spread the Samkirtan movement throughout India, and today its momentum continues, until, as Lord Chaitanya predicted, every city, farm and village of the world will ring with the sound of God's praises.