"A man without constancy cannot be a diviner or a physician."

"If a man takes no thought about what is distant, he will find sorrow near at hand."

"When you see a good person, think of becoming like her/him. When you see someone not so good, reflect on your own weak points."

"The superior man is easy to serve and difficult to please."

"If you make a mistake and do not correct it, this is called a mistake."