Ira furor brevis est; animum rege, qui, nisi paret, / Imperat: hunc frenis, hunc tu compesce catena—Anger is a shortlived madness; control thy temper, for unless it obeys, it commands thee; restrain it with bit and chain. Hor.
Ira quæ tegitur nocet; / Professa perdunt 40 odia vindictæ locum—Resentment which is concealed is dangerous; hatred avowed loses its opportunity of revenge. Sen.
Irarum tantos volvis sub pectore fluctus?—Dost thou roll such billows of wrath within your breast? Virg.
Iratus cum ad se redit, sibi tum irascitur—When an angry man returns to himself, he is angry with himself. Pub. Syr.
Ire tamen restat, Numa quo devenit et Ancus—It still remains for you to go where Numa has gone, and Ancus before you. Hor.
Iron sharpeneth iron; so a man sharpeneth the countenance of his friend. Bible.
Iron with often handling is worn to nothing. 45 Lyly's Euphues.
Irony is an insult conveyed in the form of a compliment. Whipple.
Irony is jesting hidden behind gravity. John Weiss.
Irremeabilis unda—The river there is no recrossing; the styx. Hor.