David D. Flowers said this quote

Jesus' willingness to accommodate Thomas' unbelief is a reminder that God can handle our doubt. And that the rationalist doesn't need to see, touch, or run a lab test in order to believe in the resurrected Christ. Jesus told him, “You believe because you have seen me. Blessed are those who believe without seeing me” (Jn 20:29) This is not a plea to accept what goes against reason, but it is an invitation to discover a faith that goes beyond it. The example of Thomas is for the stubborn skeptic in us all.