We all must live by every word of God, so we will have seasons of both grumbling and gratitude. We all start off as slaves to sin just like Israel was in slavery in Egypt, and we cry out for deliverance from the heavy yoke of bondage.
(Exo 3:7 NKJV) And the LORD said: “I have surely seen the oppression of My people who are in Egypt, and have heard their cry because of their taskmasters, for I know their sorrows.
When we are slaves to sin we do not reap good fruit, but rather only death.
(Rom 6:20 NKJV) For when you were slaves of sin, you were free in regard to righteousness.
(Rom 6:21 NKJV) What fruit did you have then in the things of which you are now ashamed? For the end of those things is death.