Love, like everything else, exists in a spectrum. Love of another, love of the world, love of God, all these loves are really one love in different degrees of light and density.
When the heart opens, we forget ourselves and the world pours in: this world, and also the invisible world of meaning that sustains everything that was and ever shall be.
That is what happens when the heart door opens- you become less yourself than part of everything.' Many are the sentinels who guard that door: our fears, our self-importance, our meanness, our greed, our bitterness, and others.