Job 7:13-18 When I say, My bed shall comfort me, my couch shall ease my complaint; Then you scare me with dreams, and terrify me through visions: So that my soul chooses strangling, and death rather than my life. I loathe it; I would not live always: let me alone; for my days are vanity. What is man, that you should magnify him? and that you should set your heart upon him? And that you should visit him every morning, and test him every moment?
I find this last question shockingly beautiful! You can't really isolate it from the rest of the passage, without twisting it out of context. But, after you've read the passage, take the last question and ask yourself, "when was the last time God ever visited me in the morning?" And, "Does He test me every moment?"
Well, hopefully He will visit you with breath in the morning. When He does, and you feel the passing of life through your nostrils, and your chest moving gently with respiration, you will know that you've been visited by God. Yes, this life is a test, moment by moment. How will you use each breath?