Je ne sais quoi. It is the mysterious element – spirit – that we seek to stimulate, invite, welcome, admit, not in order to know it but because without it things are just a little dull. It is what turns an ordinary experience into an event – a thing to remember, retell and relive – a teaching. The teacher has the ability to generate such events but only when stimulated, so if you are beginning to find the teaching monotonous and predictable the chances are the teacher feels exactly the same way about you.