Wise sayings (2)

Do you know who said these wise words?

6. Straight forwardness, without the rules of propriety, becomes rudeness.
7. What you do not want done to yourselves, do not do to others.
8. A man of humanity is one who, in seeking to establish himself, finds a foothold for others and who, desiring attainment for himself, helps others to attain.
9. By nature, men are nearly alike; by practice, they get to be wide apart.
10. There are cases in which the blade springs, but the plant does not go on to flower. There are cases where it flowers, but no fruit is subsequently produced.