Holy Spirit

And so it is written, “The first man Adam became a living being.”[a] The last Adam became a life-giving spirit. I Corinthians 15.45

The generation from the first Adam is earthly, fleshly, and rebellious. It is impossible to keep communion with the Spirit of God. But the Last Adam, the Lord Jesus, is Spiritual and Vivifying. That's why it's important to be born of the Holy Spirit, so one can have the same spiritual and vivifying nature as the Lord Jesus'.