'According to the Flesh' in the Bible

Wishing this therefore, did I use lightness? or what I wish do I wish according to the flesh, that with me there may be the yes, yes, and the no, no?

and I desire that I may not be bold when present, with that confidence which I design to use against some who speak 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,