Let's look in the mirror. What do you see? Do you see a happy face always smiling, laughing and joking? Or is it a miserable face often complaining, worried or concerned about what might happen?
When people meet you, are they happy to do so because you'll cheer them up; or do they dread being with you and sharing your problems and difficulties?
If we are honest, we all have a tendency to complain. Some more than others. Some justified some not always really so.
We seem to complain about so many things. The weather, that's a favourite one around where I live. We always complain about it being too hot, too cold, too wet, too dry and so on. We're never satisfied. We complain about the cost of living, the Government, the environment and the planet, some family members, our health and so many other things.
When Moses got the Jews out of slavery in Egypt they did nothing but complain. Complain. Complain. Complain. They spent forty years going round in circles in the desert and wilderness of their souls rather than be thankful to God for having saved them from their enslavement.
Perhaps we are like that sometimes. We are enslaved in our own mindset of negativity and pointless anxiety rather than be thankful for what we have already received and hopeful of more to come.
How do you think God feels about that? Our doubts, our worries, our concerns and anxieties? Do they betray a certain lack of trust in Him despite what He has done for us?
In every thing give thanks: for this is the will of God in Christ Jesus concerning you. (1 Thessalonians 5:18)