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Of all the animals, the boy is the most unmanageable, inasmuch as he has the fountain of reason in him not yet regulated.

Plato (2016). “The Complete Works of Plato (Unabridged): From the greatest Greek philosopher, known for The Republic, Symposium, Apology, Phaedrus, Laws, Crito, Phaedo, Timaeus, Meno, Euthyphro, Gorgias, Parmenides, Protagoras, Statesman and Critias”, p.2716, e-artnow (Open Publishing)
Of all the animals, the boy is the most unmanageable, inasmuch as he has the fountain of reason in him not yet regulated.