Jesus said to him, “Now you believe that I am alive, because you can see me. Listen. There are people that will not see me, but they will believe in me, and God will make them really happy.”
Then the other follower, that got to the cave first, he went inside too, and he saw the bits of cloth there, but no body, and so he believed that Jesus was alive again.
You never saw Jesus, but you love him. You can’t see him now, but you trust him. You are trusting God, and he is saving you, so you are really happy. You are so happy you can’t properly say how happy you are.