17 When they saw Him, they worshiped Him; but some doubted. (NKJV)
Some doubted-check to see if Thomas had touched hands & side yet or if more than 11 may have been there
Since Jesus has all authority, we may obey w/o fear. He is in control because of His death & resurrection
Christianity is a missionary faith which is demanded by the very nature of God as He is love & is not willingly that any should perish.