Eight days later, his disciples were inside again, and Thomas was with them. Although the doors were locked, 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; and put out your hand, and place it in my side. Do not disbelieve, but believe.” Thomas answered him, “My Lord and my God!” John 20:26-28 (ESV)
After Jesus' resurrection, even among the apostles, there were those who struggled or refused to believe He was alive. Thomas, in particular, earned himself the dubious honor of representing all doubters throughout history because of his unwillingness to believe. When Jesus appeared to the apostles in this passage, He repeated Thomas' previous expectation of proof back to him almost verbatim, revealing His wounds and putting all doubt to rest.
Thomas' response is moving, but the admonition Jesus gives in the verses that follow is for us all: do we reserve belief only for those times when we have proof of God's work, or do we believe Him simply because He is God? Jesus' appearance to Thomas set him on a lifelong path of devotion and ministry for the gospel, but we should all consider how much more blessing Thomas might have experienced if he had chosen belief before his faith was made sight.