Adam and Eve listened to Satan’s complaint that they actually did not have all that they could really have – they believed the lie that Yahweh’s provision was not enough.
Genesis 3:5 For God knows that in the day you eat from it your eyes will be opened, and you will be like God, knowing good and evil.
Complaining is in effect saying, “God is not my sufficiency. He cannot meet my needs, and He does not love me.”
In Psalm 77, David has a lot of reasons to complain. To counteract his complaints, David expressed:
Psalm 77:13 - 14 …What god is great like our God? You are the God who works wonders...
We have trials and tribulations. We bring them to God, and He delivers us. When we hear ourselves grumble and murmur as the Israelites did in the wilderness, calamity results. Complaining to others about our relationships, jobs, health, and church are all ways of saying over and over, “God does not love me and cannot deliver me.” The Israelites learned that the consequences of their sin of not believing in God’s provision and love landed them in the wilderness for 40 years.
I have found myself recently complaining. Complaining about silly and what I deem important things under the guise that I am being “honest” is actually sin. Well, I am greatly convicted of my sin that when I complain (which means not looking for results and just grousing), I am saying each time that I do not believe God loves or provides for me. This sin pains and grieves my heart because THAT is a serious evil lie. Yahweh loves us. He provides abundantly for us. How can we ever have a “complaint”? We have faith that He will provide.