Memory， I realize， can be an unreliable thing； often it is heavily coloured by the circumstances in which one remembers.

The key to success is to keep learning and adapting.

出自先秦《荀子·劝学》。定居一定要选择适当的邻里，交游一定要接近贤士。说明要加强道德修养，就应该注意周围环境。