advocatus diaboli (L: devil's advocate) a carping [adverse] critic (弁護する方は advocatus Dei という).

aegrescit medendo (L: it [he] becomes worse from the very remedies employed) The remedy is worse than the disease. (cf. Virgil, Aeneis 12: 46)

aequam memento rebus in arduis servare mentem (L) Remember to keep an even mind in difficulties.　― Horace, Odae 2: 3: 1 (cf. mens aequa…).