Christian conversion is the spiritual awakening of our souls to the glory of God as the ground of our joy.
Being loved by God is the wonderful replacement of self as the foundation of our joy. In the place of self comes the glory of God. Most people know that the greatest experiences of joy in this life — the ones that come closest to being pictures of perfect joy in heaven — are not the experiences of self-affirmation, but of self-forgetfulness in the presence of something majestic.
Being loved by God is the exhilarating deliverance from the hall of mirrors we once thought would bring us happiness — if we could just like what we see. Heaven is not a hall of mirrors. Or maybe we should say, heaven is a world in which all created things have become mirrors, and all of them are tilted to a 45 degree angle. Everywhere we look — in every creature — we see the reflection of God.
– John Piper, God is the Gospel, 151-152.