Cato requested old men not to add the disgrace of wickedness to old age, which was accompanied with many other evils. - Plutarch

So they cut their hair short in front, that their enemies might not grasp it. And they say that Alexander of Macedon for the same reason ordered his generals to have the beards of the Macedonians shaved, because they were a convenient handle for the enemy to grasp.

Scilurus on his death-bed, being about to leave four-score sons surviving, offered a bundle of darts to each of them, and bade them break them. When all refused, drawing out one by one, he easily broke them,—thus teaching them that if they held together, they would continue strong; but if they fell out and were divided, they would become weak.

... man by nature is not a wild or unsocial creature, neither was he born so, but makes himself what he naturally is not, by vicious habit; and that again on the other side, he is civilized and grows gentle by a change of place, occupation, and manner of life, as beasts themselves that are wild by nature, become tame and tractable by housing and gentler usage...