'According to the Flesh' in the Bible

so that what is required by the Law might be accomplished in us, who walk not according to the flesh, but according to the Spirit.

For they who are according to the flesh have their mind on the things of the flesh; but they who are according to the Spirit, on the things of the Spirit.

So then, brethren, we are debtors not to the flesh, to live according to the flesh.

For if ye live according to the flesh, ye are sure to die; but if by the Spirit ye make an end of the deeds of the body, ye will live.