[a].
LXXb adds so that they are mindful that those who are alive now are mortal.
[b].
LXXb adds 17:16–17a Their ways from youth led toward evil things, and they were not strong enough to make their hearts flesh instead of stone. When he divided up the nations of all the earth,
[c].
LXXb 17:18 adds whom, being the oldest male, he nurtures with instruction, and, apportioning the light of his love, he doesn’t neglect Israel (or him).