Retire into yourself as much as possible. Associate with people who are likely to improve you. Welcome those whom you are capable of improving. The process is a mutual one. People learn as they teach.
~ Seneca (4 BC – 65 AD)
Source: Letters from a Stoic
I’ve been an instructor of kind or another most of my life. And with each subject I taught, I learned as much, if not more, than what I was teaching. My students were my most important teachers.