'Of the Flesh' in the Bible

Ye know how though infirmity of the flesh, I preached the gospel to you at first.

Ye know how through infirmity of the flesh I preached the gospel unto you at the first.

But he by the servant woman was born of the flesh, and he by the free woman, by the promise.

But, just as, then, he that after the manner of the flesh had been born, did persecute him who had been born after the manner of the Spirit, thus, also now.

This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.

For the sinful nature has its desire which is opposed to the Spirit, and the [desire of the] Spirit opposes the sinful nature; for these [two, the sinful nature and the Spirit] are in direct opposition to each other [continually in conflict], so that you [as believers] do not [always] do whatever [good things] you want to do.

Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,

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.