If I am walking with two other men, each of them will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself.
(Confucius, Chinese Philosopher)
You can learn from everyone that is observed in your lifetime. The good and the bad qualities that are seen in people are all lifetime lessons for those who choose to learn from them. Those who will not learn from others around them will soon fall far behind those who will.