Adam Clarke on John 16:22

Your joy no man taketh from you - Or, shall take away. Some excellent MSS. and versions read the verb in the future tense. Our Lord's meaning appears to have been this: that his resurrection should be so completely demonstrated to them, that they should never have a doubt concerning it; and consequently that their joy should be great and permanent, knowing that the atonement was made, the victory gained, and the kingdom of heaven opened to all believers. Therefore it is said, Act 4:33, that with great power did the apostles give witness of the resurrection of the Lord Jesus.