Form and Freedom
Health of any kind is a dynamic balance. Just as we need not too much and not too little of a given vitamin, we have to balance certain things in order to teach in healthy ways. In balance, our lessons are the right balance of information, of challenge, of joy, of work, of play, of rigor, etc, etc. A simple but profound way of exploring balance is to look at the dynamic range between form and freedom.
Journey vs Destinination
The old expression "Journey vs Destination" is an important distinction to consider when taking the path of teaching. We take a lot of pressure off of ourselves and our students/children when we embrace the journey. It is actually a fundamentally important conviction for the teacher.