The roots of education are bitter, but the fruit is sweet.-Aristotle
A just war is better than an unjust peace.-Fighting between countries for a fair and good cause is better than no fighting in a situation that is unfair.
A still tongue makes a wise head.-Someone who does not talk much, but listens to other people, probably has experience, knowledge and good judgement.
A word to the wise is enough.-A very brief warning or explanation is enough for an intelligent person.
A watched pot never boils.-Anything that we wait for with eager attention seems to take a very long time.