New International Version
For I know that good itself does not dwell in me, that is, in my sinful nature. For I have the desire to do what is good, but I cannot carry it out.

American Standard Version
For I know that in me, that is, in my flesh, dwelleth no good thing: for to will is present with me, but to do that which is good is not.

Berean Study Bible
I know that nothing good lives in me, that is, in my flesh; for I have the desire to do what is good, but I cannot carry it out.

Douay-Rheims Bible
For I know that there dwelleth not in me, that is to say, in my flesh, that which is good. For to will, is present with me; but to accomplish that which is good, I find not.

English Revised Version
For I know that in me, that is, in my flesh, dwelleth no good thing: for to will is present with me, but to do that which is good is not.

King James Bible
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.

World English Bible
For I know that in me, that is, in my flesh, dwells no good thing. For desire is present with me, but I don't find it doing that which is good.

Young's Literal Translation
for I have known that there doth not dwell in me, that is, in my flesh, good: for to will is present with me, and to work that which is right I do not find,

Romans 7:18 Additional Translations ...