This is referencing SpiritBaptism and the state of those who are SpiritFilled.

This powerful prophecy of the BaptismOfTheHolySpirit set in the context of Israel^s dispersion and reconstitution after the Babylon experience points to the small-mindedness of men who consider their physical well-being as primary, whereas our Lord, being Spirit, is more interested in our spiritual state and our intimate, personal relationship with Him.

John the Baptist told us what our Lord Jesus Christ would do for us and to us Mat 3:11.