Day 8 of 40 shows that Yahweh is your life.

"Israel will choose life by -- in the words of Deuteronomy 30:20, a verse that summarizes the essence of Deuteronomy as a whole -- 'loving the LORD your God, by obeying His voice, and by holding fast to Him; for this is your life and the length of your days, that you may live in the land which the LORD swore to your fathers, to Abraham, Isaac, and Jacob, to give them' (NASB)." (Dr. Timothy Berrey, "40 Days Through The Bible")