In mediæval art, thought is the first thing, execution the second; in modern art, execution is the first thing and thought the second. Ruskin.

In mediæval art, truth is first, beauty second; in modern art, beauty is first, truth second. Ruskin.

In medias res—Into the midst of a thing at once.

In medio tutissimus ibis—You will go safest in the middle or in a middle course. Ovid.

In medio virtus—Virtue lies in the mean. Pr. 5

In meinem Revier / Sind Gelehrten gewesen / Ausser ihrem Brevier / Konnten sie keines lesen—In my domain there have been learned men, but outside their breviary they could read nothing. Goethe.

In meinem Staate kann jeder nach seiner Façon selig werden—In my dominions every one may be happy in his own fashion. Frederick the Great.

In melle sunt sitæ linguæ vestræ atque orationes, / Corda felle sunt lita atque aceto—Your tongues and your words are steeped in honey, but your hearts in gall and vinegar. Plaut.

In memoriam—To the memory of.

In men we various ruling passions find; / In 10 women, two almost divide the mind; / Those, only fix'd, they first or last obey, / The love of pleasure and the love of sway. Pope.