If there were one word that could act as a standard of conduct for one's entire life, perhaps it would be 'thoughtfulness.
The funniest people are the saddest once
In old days men studied for the sake of self-improvement; nowadays men study in order to impress other people.
The beginning of wisdom is to call things by their proper name.
The strongest memory is not as strong as the weakest ink.
The archer who misses his mark does not blame the target. He stops, corrects himself and shoots again.