What does Jesus promise his followers?

He promised them the ‘baptism of the Holy Spirit.’

This means that the Holy Spirit would come and empower them to live righteously and serve faithfully.

What do his followers think?

In the disciples’ minds, the outpouring of the Holy Spirit and the coming of the promised kingdom were closely related and the Old Testament often connected these concepts.

They concluded that Christ was about to establish His kingdom here on earth, but that was not God’s plan. (v. 7)