'Flesh' in the Bible

Having therefore this purpose, did I then use lightness? Or what I purpose, do I purpose according to flesh, that there should be with me yea yea, and nay nay?

for we who live are always delivered unto death on account of Jesus, that the life also of Jesus may be manifested in our mortal flesh;

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

Having therefore these promises, beloved, let us purify ourselves from every pollution of flesh and spirit, perfecting holiness in God's fear.

For indeed, when we came into Macedonia, our flesh had no rest, but we were afflicted in every way; without combats, within fears.

but I beseech that present I may not be bold with the confidence with which I think to be daring towards some who think of us as walking according to flesh.

For walking in flesh, we do not war according to flesh.

Since many boast according to flesh, I also will boast.

And that I might not be exalted by the exceeding greatness of the revelations, there was given to me a thorn for the flesh, a messenger of Satan that he might buffet me, that I might not be exalted.