romans 7:7-8

What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead.

i think the usage of the word "lust" in verse 7 compared to how i used to remember the verse as paraphrased in niv "i would not have known what coveting meant if the law did not say "do not covet" ", puts a really unique spin on this verse; i've never really seen coveting as a form of lusting, but now i do...

concupiscence means strong desire, esp, sexual desire

read the rest of the chapter and you'll see one of the reasons why some christians, including me now, believe firmly that man has a will, but it is not free to choose between good and evil