Radak: He wants life, and to see good in his days - in this world and the world to come.

Malbim: Nochri Nezirim separated from the world, either because they despised life, or they despised the good of the world and chose to live a life of pain. However, I will teach to you Yir'as Hashem also for one who one who desires life, and to see good in his days. One can live a life of success and good with Yir'as Hashem. It does not obligate one to separate from civilization.