A week after Jesus appeared to the Disciples (Thomas was not there the first time) they were again gathered in the house, this time Thomas was with them. Although the doors were shut, Jesus came and stood among them and said “Peace be with you”. Then he said to Thomas, “Put your finger here and see my hands. Reach out your hand and put it in my side. “DO NOT DOUBT BUT BELIEVE.“ Thomas answered him, “MY LORD AND MY GOD!”
Verse 31: But these things are written so that you may come to believe, that Jesus is the Messiah, the Son of God, and that through believing you may have life in his name.