Existence of God, in religion, the proposition that there is a supreme supernatural or preternatural being that is the creator or sustainer or ruler of the universe and all things in it, including human beings. In many religions God is also conceived as perfect and unfathomable by humans, as all-powerful and all-knowing (omnipotent and omniscient), and as the source and ultimate ground of morality.
Belief in the existence of God (or gods) is definitional of theism and characteristic of many (though not all) religious traditions. For much of its history, Christianity in particular has been concerned with the question of whether God’s existence can be established rationally (i.e., by reason alone or by reason informed by sense experience) or through religious experience or revelation or instead must be accepted as a matter of faith. You aren’t meant to live life apart from the knowledge of God’s faithfulness. You aren’t meant to live with the weight of doing life on your own.
Man may fail you, but your God will not. Family and friends may not be there when you need them, but your God will always be there for you.