In the first reading from Acts we find Paul preaching in Athens. He had discovered an altar inscribed "To an Unknown God" and he tells them "what therefore you unknowingly worship, I proclaim to you." He then tells the Athenians that it is this God who made the world and all that is in it ...who gives to everyone life and breath and everything..." And he adds that he is not far from any one of us, "for in him we live and move and have our being."
Let us be grateful for we have known the living God. He is not an "unknown" God for us as we have experienced his love and goodness to each of us in so many ways. We will never be able to fully understand and know God, yet in him we live and move and have our being.