The demand for instant gratification is destructive. This pattern, if not stopped, will result in a life dominated by the desire for immediate gratification. Immediate gratification is the gateway to a life of destructive, abusive relationships, pornography, substance abuse, abusive behavior. If you hear your child frequently complain or grumble, you are hearing a child who is becoming a slave to his own desires.
Sin feeds on the desire for immediate happiness. That is why a child can go from seeming bliss to outrage in an eye blink. One moment everything is fine. Then he sees his brother with a toy that he wants and he immediately erupts with a howl that sounds like he is being tortured. Why? Because he doesn't have what he wants, what he thinks he deserves.
Complaining and grumbling are not compatible with a life of praise. The Bible teaches that God is a faithful God who does no wrong, who is always to be praised (Deuteronomy 32:3-5; Philippians 2:14-15). If God is always faithful, there is no room for grumbling and complaining.
Complaining is the opposite of praise. Praise is being aware of and motivated by God's constant goodness and grace. Telling a child to stop complaining will not stop the advance of this corrosive sin. Only praise and gratitude to God for his faithfulness can do that.
[Read the rest of the article at Shepherd Press.]