he was gone; while he was with them, he was a support to them, kept them in countenance, kept them in heart; but, if he leave them, they will be as sheep having no shepherd, an easy prey to those who seek to run them down. Now, to silence these fears, Christ here assures them that they should be clothed with powers sufficient to bear them out. As Christ has all power, they, in his name, should have great power, both in heaven and in earth. I. Great power on earth (v. 12): He that believeth on me