 St. Thomas heard it from the guys who were closest to Jesus, plus those first witnesses who came to those ten apostles and were not believed. And so in a way, Thomas' doubt is graver. There's more people telling him that this really happened. There's more people telling him what they saw. And yet he says, unless I see it, I will not believe it. Jesus, you're so good to Thomas, and you're so good to us. You give us