III. (11) We have now then said enough by way of preface to this treatise. We will proceed to adduce the proofs of all that we have said, beginning first of all to establish the first point. We said, then, that ignorance was the cause of man’s behaving foolishly and misconducting himself, just as a great quantity of unmixed wine is to great numbers of foolish persons; (12) for ignorance is the primary evil of all the errors of the soul, if we must tell the truth, from which, as from a spring, all the actions of life do flow, never producing to any one, one single stream of wholesome or drinkable water, but only brackish water, the cause of disease and destruction to all who use it. (13) Thus, at all events, the lawgiver is very indignant with all uninstructed and unmanageable persons, more than he is with any other description of people whatever. And a proof of this is this: who are they who are united in alliance not so much by study as by nature, whether among men or among the other kinds of animals? No one; not even a madman would say that any beings were so closely united as parents and children; for even by the mere untaught instinct of nature the parent always cares for his offspring, and in every case endeavours to provide for its safety and durability.