'Working' in the Bible

I am not ashamed of the gospel, for it is the power of God for salvation [from His wrath and punishment] to everyone who believes [in Christ as Savior], to the Jew first and also to the Greek.

But to the one who does not work [that is, the one who does not try to earn his salvation by doing good], but believes and completely trusts in Him who justifies the ungodly, his faith is credited to him as righteousness (right standing with God).

Did that which is good [the Law], then become death to me? Certainly not! But sin, in order that it might be revealed as sin, was producing death in me by [using] this good thing [as a weapon], so that through the commandment sin would become exceedingly sinful.