'Of the Flesh' in the Bible

And ye know that through weakness of the flesh I announced the good news to you before.

And I say, Walk in Spirit, and complete not the desire of the flesh.

And the works of the flesh are manifest, which are; Adultery, fornication, uncleanness, licentiousness,

For he sowing to his flesh of the flesh shall reap corruption; but he sowing to the Spirit, of the Spirit shall reap eternal life.