Is it a sin to complain?

Numbers 11:1Soon the people began to complain about their hardship, and the Lord heard everything they said. Then the Lord’s anger blazed against them, and he sent a fire to rage among them, and he destroyed some of the people in the outskirts of the camp.

Numbers 14:1-2, 4Then the whole community began weeping aloud, and they cried all night. Their voices rose in a great chorus of protest against Moses and Aaron. “If only we had died in Egypt, or even here in the wilderness!” they complained. . . . Then they plotted among themselves, “Let’s choose a new leader and go back to Egypt!”

Numbers 21:5-6They began to speak against God and Moses. “Why have you brought us out of Egypt to die here in the wilderness?” they complained. “There is nothing to eat here and nothing to drink. And we hate this horrible manna!” So the Lord sent poisonous snakes among the people, and many were bitten and died.

Deuteronomy 6:16“You must not test the Lord your God as you did when you complained at Massah.”

1 Corinthians 10:10Don’t grumble as some of them did, and then were destroyed by the angel of death.

Complaining against God is a sin. It demonstrates an attitude of ungratefulness and puts God to the test by implying his actions have been unfaithful, inadequate, or even unrighteous. The Israelites had been miraculously rescued from slavery in Egypt by the living God, the very definition of perfection. Yet the minute they began to feel hungry or thirsty or fearful, they began to complain—some even wanted to return to Egypt! The Israelites’ complaints were not the cries of desperate children but amounted to insults and challenges to God, motivated by unbelief. They had decided they were dissatisfied with all God had done for them. This complaint against God was a big enough sin that he punished the Israelites severely for it.

Psalm 106:25Instead, they grumbled in their tents and refused to obey the Lord.

Complaining often reveals an attitude of bitterness and an intent to disobey, and influences others toward sin. When you are focused on the fact that you don’t like where you are or what you have, and you want everyone around you to know about it, you complain, spreading your ungratefulness and negativity.

James 4:11Don’t speak evil against each other, dear brothers and sisters. If you criticize and judge each other, then you are criticizing and judging God’s law. But your job is to obey the law, not to judge whether it applies to you.

James 5:9Don’t grumble about each other, brothers and sisters, or you will be judged. For look—the Judge is standing at the door!

Complaining about others usually leads to sin because you say things about them you may later regret. It often leads to gossip and slander.