No law is quite appropriate for all.
The study of History is the best medicine for a sick mind.
Fame opportunely despised often comes back redoubled.
...war is just to those for whom it is necessary, and arms are clear of impiety for those who have no hope left but in arms.
Shared danger is the strongest of bonds; it will keep men united in spite of mutual dislike and suspicion.
I have often heard that the outstanding man is he who thinks deeply about a problem, and the next is he who listens carefully to advice.