How fortuitous! There's this omnipotent, omniscient, omnipresent, omnibenevolent, eternal being which has the power to create entire universes and all of the life within them, and this being has decided to bestow upon you, one lowly human out of around 7 billion lowly humans, the very distinctive honor of having an ongoing relationship with him/her/it.
So, having made the decision, for seemingly no reason at all, to grant you this honour, this being enters your heart, hunkers down in one of your aortic valves, and remains there until the day you die, guiding you, helping you, being your spiritual guide, your confidante, your friend. And then, upon your death, this being grants you the even bigger honour of living with him/her/it for eternity in his/her/its eternal amusement park.