Krishna, “the all-attractive one,” means the original, unique Supreme Person, the source of everything that exists. God has many names, and each describes a different aspect of His unique personality. Allah, Vishnu, Jehovah, and God refer to His roles as creator, maintainer of the universe, and the supreme master of all. The name Krishna suggests the most charming and beautiful qualities of the Supreme Person, as He is, and as He appears to His dear most devotees.
Krishna appears as other forms of God—avatars, technically known as incarnations—to create and maintain the universe, while He simultaneously enjoys loving relationships with His innumerable associates in the transcendental realm. He visits this material world occasionally to free His dearest devotees from material existence and to annihilate the miscreants He performs suprahuman pastimes—lifting mountains, swallowing forest fires, and killing numerous extraordinarily powerful demons—as easily as a child playing with toys.
http://www.harekrishnatemple.com/chapter10.html
http://iskconbirmingham.org/krishna-is-the-supreme-personality-of-godhead
http://iskconbirmingham.org/god

