'According to the Flesh' in the Bible

Having, then, this purpose, did I act with levity? Or in my purposes do I resolve according to the flesh, that with me there should be now yea, yea, and now nay, nay?

So that we henceforth know no one according to the flesh; and if we have even known Christ according to the flesh, yet now we no longer know him.

but I entreat you, that I may not when I am present be bold with that confidence wherewith I think of being bold towards some, who think of us as walking according to the flesh.

For though we walk in the flesh, we do not war according to the flesh,