'According to the Flesh' in the Bible

When I therefore was thus minded, did I use lightness? or the things that I purpose, do I purpose according to the flesh, that with me there should be yea yea, and nay nay?

But I beseech you, that I may not be bold when I am present with that confidence, though I think to be bold against some, who think of us as if we walked according to the flesh.

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