La Rochefoucauld §laroch_144: We do not like to praise, and we never praise without a motive.

We do not like to praise, and we never praise without a motive. Praise is flattery, artful, hidden, delicate, which gratifies differently him who praises and him who is praised. The one takes it as the reward of merit, the other bestows it to show his impartiality and knowledge.