We read Acts 2:1-21, which tells the wonders of the first Pentecost, in light of Genesis 10-11, Exodus 24:17, Leviticus 23:15-17, Joel 2:28-32, 3 Kingdoms/1 Kings 8:27-30; 41-43, and Hebrews 12:18. Here is the great reversal and first sign of unity; here is the beginning of the mighty Acts of God seen in the Apostles.