A great teacher should be a conduit pipe. The teacher should absorb and reflect the thoughts and enhance more the teachings of his / her mentor (metaphor : moon)
Like a sea wave or time clock, consistency is important and it is the key to our success.
At the end of any course, a student should evolve and progress without clinging to the teacher for the lifetime. (Metaphors : Rope, Magnet and open border)
When we concentrate one stroke at a time, every curved line becomes straight and then sky is the limit to achieve our dreams. (Metaphors : Curved border, straight border, Sky)