Right. Sowing to the flesh will reap corruption - death, grave, darkness (it's very dark in graves/tombs)............not a lower level of salvation.
Gal 6:8
For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.
2Ti 2:19-22
Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity.
But in a great house there are not only vessels of gold and of silver, but also of wood and of earth; and some to honour, and some to dishonour.
If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work.
Flee also youthful lusts: but follow righteousness, faith, charity, peace, with them that call on the Lord out of a pure heart.
God will not be mocked remember………vessels of dishonour who keep on sinning wilfully and treading the blood Christ underfoot are not going to be saved at all but turfed out. “Away from me, I never knew you” ...is not salvation on any level.