The Holy Trinity is revealed in both the Old and New Testamets:
Having come down in a cloud, the LORD stood with Moses there and proclaimed his name, "LORD." Thus the LORD passed before him and cried out, "The LORD, the LORD, a merciful and gracious God, slow to anger and rich in kindness and fidelity." Ex. 34.
Steven Hawkings, the atheist and cosmologist once asked, "What is it that breathes fire into the equations and makes a universe for them to describe?" The answer is a who, not a what, this week on OVC.