'First Man' in the Bible

So, it is also written [Gen. 2:7], "The first man, Adam, became a living being." The last Adam [i.e., Christ], became the Spirit who gives [never ending] life. [See John 5:21].

The first man [i.e., Adam] came from the dust of the ground [See Gen. 2:7]; the second man [i.e., Christ] came from heaven.