Every year the almond tree sheds its old leaves and gets new ones. Every year the schools are closed for a year and the kids go to a new class with new books after that. In both cases there is a symbolic change to accompany the actual changes in life of both. If learning never stops and we are constantly rediscovering, shouldn't we also have something symbolic that will give us the freedom to see what we have accumulated in the past, evaluate it and drop whatever is not useful so that we are more receptive and willing to accumulate new things that will serve us well in future.