The highway of the upright is to depart from evil. To avoid the dangerous byways to which evil leads, one must walk straight in the path of duty (comp. Proverbs 15:19). Septuagint, "The paths of life decline from evil;" and this version adds some paragraphs in illustration, which are not in the Hebrew: "And the ways of righteousness are length of life.
He who receiveth instruction will be among the good [or, 'in prosperity,' ἐν ἀγαθοῖς], and he who observeth reproof shall become wise." He that keepeth his way preserveth his soul. He who continues in the right way, and looks carefully to his goings, will save himself from ruin and death (Proverbs 13:3).
Septuagint, "He who watcheth his own ways keepeth his life." And then is added another maxim, "He that loveth his life will spare his mouth."