Part 2: On perspicaciousness (good judgment, perceptiveness), reasonableness, sagacity, savoir-faire, wisdom, and worldly wisdom

F

Leave the fighting to God, sit back and watch.
(One should leave those who have injured one to God's judgement and punishment.)

Hide-me-and-I-will-kill-you is the name a disease answers to.
(A concealed disease is a deadly thing.)