Those who have dedicated their lives to Krishna, Krishna remembers that this devotee has offered everything for my Sake. In this way Krishna is so Grateful.
Krishna can do anything. He can make the impossible endeavors of his devotees possible. Krishna can empower him because he is the supreme controller.
In the light of Krishna Consciousness, we can see everything as a prefect way. Krishna consciousness means to be aware of the fact how merciful Krishna is.
A living entity becomes aware of his Spiritual Identity and becomes aware of the Supreme Personality of Godhead only when he comes accross a Sprititual Master.