Doubt is the abettor of tyranny. Amiel.
Doubt is the vestibule which all must pass before they can enter into the temple of wisdom. Colton.
Doubtless the pleasure is as great / Of being 25 cheated as to cheat. Butler.
Doubt of any sort cannot be removed except by action. Goethe.
Doubt thou the stars are fire; / Doubt that the sun doth move; / Doubt truth to be a liar; / But never doubt I love. Ham., ii. 2.
Douceur—A bribe. Fr.
Do ut des—I give that you may give. Maxim of Bismarck.
Doux yeux—Tender glances. Fr. 30
Dove bisognan rimedj, il sospirar non vale—Where remedies are needed, sighing is of no use. It. Pr.
Dove è grand'amore, quivi è gran dolore—Where the love is great the pain is great. It. Pr.