Jesus never leaves us in that place. He demonstrated for us on the cross by showing them his wounds, and then commissioned them as Apostles of the church! They are witness to all of the things He has done, and so are we.

"Jesus doesn't leave us in fear or disbelief, He makes a point to remove the doubt within Thomas by appearing so that he may believe. Jesus comes to Thomas that He may cast out his fears. Thomas was shown so that today, we may believe."