What do you mean by "Teaching is Living, Living is Teaching?"?

Answer 1

Teaching is Living - you teach as if everything you do is a must, is required, is essential to living. Teaching is living and learning. When you are living you are also learning. You learn throughout your entire life and who is the teacher. Life itself. So, Living is Teaching. That gets us back to the original phrase that Teaching is Living, Living is Teaching.
"Teaching is Living" - think of all the things that are incorporated into "living" (learning, laughing, helping, experiencing, crying, etc) and then look at what the good dedicated teacher is and does, so for them teaching and life is synonymous. To them their entire existence is teaching, teaching to them IS living. And, to those people, the whole idea of living IS teaching. To chose people, teaching is not a job, it is a way of life - their life is wrapped around 'teacher'.

I fully believe, true dedicated teachers believe that: "Teaching is a way of life."

Answer 2

while you live you tech yourself a lesson.
when you teach you earn money or you are happy for what you are doing.