Adam Clarke on Proverbs 12:28

In the way of righteousness is life - חיים chaiyim, lives; life temporal, and life eternal.

And in the pathway thereof there is no death - Not only do the general precepts and promises of God lead to life eternal, and promote life temporal; but every duty, every act of faith, patience of hope, and labor of love, though requiring much self-abasement, self-denial, and often an extension of corporal strength, all lead to life. For in every case, in every particular, "the path of duty is the way of safety." The latter clause is only a repetition of the sense of the former.