In serum rem trahere—To protract the discussion, or the sitting, to a late hour. Livy.
In service, care or coldness / Doth ratably thy fortunes mar or make. George Herbert.
In situ—In its original position. 50
In small proportion we just beauties see, / And in short measures life may perfect be. Ben Jonson.
In so complex a thing as human nature, we must consider it hard to find rules without exceptions. George Eliot.
In solitude the mind gains strength and learns to lean upon itself. Sterne.
In solo Deo salus—Salvation in God alone. M.
In solo vivendi causa palato est—To gratify the 55 palate is the sole object of their existence. Juv.
In some men a certain mediocrity of mind helps to make them wise. La Bruyère.
In some men there is a malignant passion to destroy the works of genius, literature, and freedom. Junius.