Curiosity in children ... is but an appetite after knowledge and therefore ought to be encouraged in them, not only as a good sign, but as the great instrument nature has provided to remove that ignorance they were born with and which, without this busy inquisitiveness, will make them dull and useless creatures.
John LockeHe that in the ordinary affairs of life would admit of nothing but direct plain demonstration would be sure of nothing in this world but of perishing quickly.
John Locke