'According to the Flesh' in the Bible

What then shall we say that Abraham, our ancestor according to the flesh, has discovered regarding this matter?

so that the righteous requirement of the law may be fulfilled in us, who do not walk according to the flesh but according to the Spirit.

For those who live according to the flesh have their outlook shaped by the things of the flesh, but those who live according to the Spirit have their outlook shaped by the things of the Spirit.

So then, brothers and sisters, we are under obligation, not to the flesh, to live according to the flesh

(for if you live according to the flesh, you will die), but if by the Spirit you put to death the deeds of the body you will live.