'According to the Flesh' in the Bible

For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit set their minds on the things of the Spirit.

I beg you that when I come I will not need to be courageous by daring to oppose some people who think that we are living according to the flesh.

But just as then the son who was conceived according to the flesh persecuted the son who was conceived according to the Spirit, so it is now.