'Of the Flesh' in the Bible

but you knew I preached the gospel to you on my former [visit] in weakness of the flesh,

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

But as then he that was born of the flesh persecuted him that was born of the Spirit, so also now.

And I say, walk in the Spirit and perform not the desire of the flesh.

For the works of the flesh are manifest, which are, fornication, impurity, lewdness,

for he that sows for his flesh, shall of the flesh reap destruction; but he that sows for the Spirit, shall of the Spirit reap life eternal.