So my question is this. Can the natural man do anything that's spiritually good? Or to ask another way, can the natural man do anything to glorify God?
If E = mc2 then we can divide and conclude that...
Mass (m) = Energy (E/c2)
And there are three varieties...
Natural E/c2 - All mass is basically cooled plasma
Mental E/c2 - Mentally, A mathematical formula, but this has chemical and spiritual properties as well.
Spiritual E/c2 - E (motivation, warmth, love) / c2 (faith, hope, charity, joy)
But we have this treasure in earthen vessels, that the excellency of the power may be of God, and
not of us. - 2 Corinthians 4:7
If the excellency of the power dwell in us spiritually, naturally, and intelligently, from God himself, then we can do that which is spiritually good. If the excellency of the power from the Holy Spirit is not of God, then we struggle.
But if the excellency of the power is not of God, which I believe more times than not is true, then we must do the best we can do. We therefore can do what is spiritually good away from God, but we will do a better job if it is indeed God.