"We expect too much from our children. We exact from them a perfection which we are far from carrying out in ourselves; we require of them sacrifices much heavier, comparatively, than those of any grown-up person."

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Let there be two possible things, A and B, one of which is such that it is necessary that it exists, and let us assume that there is more perfection in A than in B. Then, at least, we can explain why A should exist rather than B and can foresee which of them will exist; indeed, this can be demonstrated, that is, rendered certain from the nature of the thing.

— Gottfried Leibniz