Kids will often complain that life is "unfair." They imply that there is no justice in this life, as do a great many adults. But that is simply not true.
What Justice Is
Justice is a condition that variably includes fairness, equality, integrity, consistent consequences for choices, uniform standards, transparent and clear rewards for effort and merit, and more.
Is this high standard for justice achievable in this mortal life? YES, it is, but not everywhere and not all the time. If we follow the Laws of Happiness—if we feel loved, and if we are loving and responsible—happiness is a guarantee, no matter what circumstances swirl around us. If we live congruent with those laws, the rewards are predictable. THAT is justice.
What Justice Is Not
But when people—notably our children—scream for justice, what they really mean is that they're not getting what they WANT. They demand a new phone, for example, without effort or merit, but they disregard the housing, food, safety, transportation, entertainment, and innumerable privileges and luxuries they presently enjoy—also without effort or merit. Or they insist that they are being deprived of a particular privilege that a sibling is enjoying in the moment.
In short, people scream for immediate and skewed micro-justice. But that's not how the universe works. If you plant a seed in the ground, screaming for an immediate harvest—because you really, really want it, or because you think that would be fair, considering your effort—is a foolish definition of shallow, twisted, and self-serving justice. But we do this screaming in life regularly.
There is plenty of justice in the world. We ARE rewarded for our wise and loving choices, as well as for our selfish ones. We just don't like the real definition of justice. Oh, and mercy? Abundant mercy is proven by the very fact that we are allowed to make choices at all.
Summary
Children often complain that life is unfair.
What children mean is that they’re not getting what they want.
We must teach our children what justice really is, and that genuine happiness is more important than a skewed, temporary sense of justice.