What three signs were given in connection with the coming of the Spirit?
See verses 2-4, and 6, 8, 11.
They express in symbol what our Lord had already stated in word (cf. 1:8), that the coming of the Spirit would lead to power, inspired utterance and universal testimony. What purposes of God was the Spirit thus given to fulfil?
What was the reaction of the disciples, the crowd and the mockers to the coming of the Holy Spirit? What do you think your reaction would have been?