Your six-year-old has become so obsessed with wanting his brother's radio controlled car that he has made himself sick whining and complaining about it. There is a reason the Holy Spirit warns against grumbling and complaining. This familiar scenario does not seem as shocking as the story of a teenager obsessed with pornography. However, the attitudes that fuel the teenager's lust and obsession are the same ones that control your six-year old. This point must not be missed. You must connect the dots of self-pity in your young children with the self-pity of teenagers caught up in sins like pornography and substance abuse.
Don't dismiss self-pity as a passing stage. Whining in young children is the early warning sign of a life centered around selfish desires. Left unchecked whining can grow into an ugly, deadly disease. Our culture is fixated on sensuality. Basically, a sensual person is obsessed about what gives him or her pleasure. So the craving for the toy is replaced with a craving for self-pleasure or a cure for discontent.
Self-pity is the enemy of sensitivity. means that I care about what is best for you over what is best for me. Sensuality means that I care about what is best for me regardless of what is best for you. Sensuality is never satisfied and continually cries out for more and more. (Ephesians 4:17-19)