'That Which Is Good' in the Bible

Was then that which is good made death unto me? God forbid! But sin, that it might appear sin, working death in me by that which is good: that sin might be shewn by the commandment to be exceeding sinful.

For I know that in me (that is in my flesh) dwelleth no good: for to will is present with me, but how to perform that which is good, I find not.

Let love be unfeigned. Abhor that which is evil, cleave to that which is good;

For your obedience is come to the knowledge of all: and therefore I rejoice on your account; but yet I would have you wise to that which is good, and simple as to that which is evil.