For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
For I know that in me (that is, in my flesh,) dwelleth no good thing - or better, 'For I know that there dwelleth not in me, that is, in my flesh, any good.'
For to will (or 'desire') is present with me; but [how] to perform that which is good (the supplement "how," in our version, weakens the statement)
I find not - or (according to what appears to have most evidence) simply, 'not so' х ou (G3756)]. Here, again, we have the double self of the renewed man: q.d., 'In me dwelleth no good; but this corrupt self is not my true self; it is but sin dwelling in my real self, as a renewed man.'