In English
There is a small example. We write all the letters A, B, C, D, on the board. We do know how those letters sound. If the teacher simply writes those letters on the board, even if your intelligence is very high, if you are not told what sound is to be associated with each one of those letters, it will remain something which you cannot learn by yourself. However intelligent you may be, someone who is a teacher has to tell you what sound has to be associated with each one of those letters. Only then can you learn the sound appropriate to each letter. Of course, in this world, we are seeing the five organs, the five (sheaths), the five elements and even the or the soul, we are able to realise and see. But those that have to tell you what the paths are which you have to adopt in order that you may realise fully the meaning of these things, are our . So we say that are time-honoured, old and ancient.