Plato

To be curious about that which is not one's concern while still in ignorance of oneself is ridiculous.

Do not train a child to learn by force or harshness; but direct them to it by what amuses their minds, so that you may be better able to discover with accuracy the peculiar bent of the genius of each.

We can easily forgive a child who is afraid of the dark: the real tragedy of life is when men are afraid of the light.