There is not any creature so terrible and dangerous by nature, but it becomes fiercer by anger. Not that beasts have human affections, but certain impulses they have which come very near them. The boar foams, champs, and whets his tusks; the bull tosses his horns in the air, bounds, and tears up the ground with his feet; the lion roars and swinges himself with his tail; the serpent swells; and there is a ghastly kind of fellness in the aspect of a mad dog. How great a wickedness is it now to indulge a violence, that does not only turn a man into a beast, but makes even the most outrageous of beasts themselves to be more dreadful and mischievous! A vice that carries along with it neither pleasure nor profit, neither honor nor security; but on the contrary, destroys us to all the comfortable and glorious purposes of our reasonable being. Some there are, that will have the root of it to be the greatness of mind. And, why may we not as well entitle _impudence_ to _courage_, whereas the one is proud, the other brave; the one is gracious and gentle, the other rude and furious? At the same rate we may ascribe magnanimity to avarice, luxury, and ambition, which are all but splendid impotences, without measure and without foundation. There is nothing great but what is virtuous, nor indeed truly great, but what is also composed and quiet. Anger, alas! is but a wild impetuous blast, an empty tumor, the very infirmity of woman and children; a brawling, clamorous evil: and the more noise the less courage; as we find it commonly, that the boldest tongues have the faintest hearts.

In the first place, Anger is _unwarrantable_ as it is _unjust_: for it falls many times upon the wrong person, and discharges itself upon the innocent instead of the guilty: beside the disproportion of making the most trivial offences to be capital, and punishing an inconsiderate word perhaps with torments, fetters, infamy, or death. It allows a man neither time nor means for defence, but judges a cause without hearing it, and admits of no mediation. It flies into the face of truth itself, if it be of the adverse party; and turns obstinacy in an error, into an argument of justice. It does every thing with agitation and tumult; whereas reason and equity can destroy whole families, if there be occasion for it, even to the extinguishing of their names and memories, without any indecency, either of countenance or action.

Seneca's Morals of a Happy Life, Benefits, Anger and Clemency — Part 155