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Corpus Callosum
Corpus Callosum

In that the right and left hand are supposed to be by nature differently suited for our various uses of them; whereas no difference is found in the use of the feet and the lower limbs; but in the use of the hands we are, as it were, maimed by the folly of nurses and mothers; for although our several limbs are by nature balanced, we create a difference in them by bad habit. In some cases this is of no consequence, as, for example, when we hold the lyre in the left hand, and the plectrum in the right, but it is downright folly to make the same distinction in other cases. The custom of the Scythians proves our error; for they not only hold the bow from them with the left hand and draw the arrow to them with their right, but use either hand for both purposes. And there are many similar examples in charioteering and other things, from which we may learn that those who make the left side weaker than the right act contrary to nature. In the case of the plectrum, which is of horn only, and similar instruments, as I was saying, it is of no consequence, but makes a great difference, and may be of very great importance to the warrior who has to use iron weapons, bows, and javelins, and the like; above all, when in heavy armour, he has to fight against heavy armour. And there is a very great difference between one who has learnt and one who has not, and between one who has been trained in gymnastic exercises and one who has not been. For as he who is perfectly skilled in the Pancratium or boxing or wrestling, is not unable to fight from his left side, and does not limp and draggle in confusion when his opponent makes him change his position, so in heavy-armed fighting, and in all other things if I am not mistaken, the like holds-he who has these double powers of attack and defence ought not in any case to leave them either unused or untrained, if he can help; and if a person had the nature of Geryon or Briareus he ought to be able with his hundred hands to throw a hundred darts. Now, the magistrates, male and female, should see to all these things, the woman superintending the nursing and amusements of the children, and the men superintending their education, that all of them, boys and girls alike, may be sound hand and foot, and may not, if they can help, spoil the gifts of nature by bad habits.

- Excerpt from Plato’s Laws, written in 360 B.C.E. (translated by Benjamin Jowett)