Poetry should be able to reach everybody, and it should be able to appeal to all levels of understanding.
Finally there are simple ideas of which no definition can be given; there are also axioms or postulates, or in a word primary principles, which cannot be proved and have no need of proof.
But we're born as children and we look at the world with open eyes... And we don't judge and we don't betray. We're not jealous. We're not envious. We're not even weary, which is a danger also as kids. They have to learn a certain amount of awareness.