Job declared these words at one of his lowest moments.
His three "friends" routinely condemned him, as if all the evil befalling him was because of something he had done.
The truth is, our self-righteousness, our self-effort, will frustrate God's grace in our lives.
"I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me. 21I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain." (Galatians 2: 20-21)
Remember to rightly divide the Word of Truth as well (2 Timothy 2: 15)
Job did not have a covenant with God, as Abraham did (Genesis 15), and as all of us do today in Jesus!
"And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance." (Hebrews 9: 15)
While Job was playing up his stoic resolve, the truth is that God is not in the business of killing us.
He is good to us, and therefore we trust Him!
"But I have trusted in thy mercy; my heart shall rejoice in thy salvation." (Psalm 13: 5)
He is merciful and that is why we trust Him!
"I love the LORD, because he hath heard my voice and my supplications." (Psalm 116: 1)
We love Him because He came through for us!
"In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him. 10Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins." (1 John 4: 9-10)
God sent His Son Jesus to die for us, to die as us, and to give us LIFE!
"The thief cometh not, but for to steal, and to kill, and to destroy: I am come that they might have life, and that they might have it more abundantly." (John 10: 10)
Jesus died that we would have everlasting life! (John 3: 16)
We can trust our Daddy God, who gave us His Son (Romans 8: 31-32)! We live under a New Covenant, where He takes care of us. All He asks us to do is ... believe Him! (John 6: 29)