We should be in harmony with our own consciousness; our mind, body, and soul should be one in interest and in purpose. And in that unified condition, we can actually express that natural innate love that we have found in our own life in everything we do in the world.
According to our purpose, motivation and sincerity, which compose our devotion, Krishna reveals Himself to us.
To purify the heart is the one and only purpose that God has created this human life.