Another amazing insight from the Rebbe Rashab – he brings an example of a teacher and a student – now before the teacher teaches the student, the knowledge is simple – it is so known to the teacher that he need not even think about it – in order to teach the student, he must “lower” himself (stop thinking about lofty thoughts) and teach – this teaches us, that before G-d made the world, none of reality even existed – even as an entity – it was only his desire to give (which manifested… – for example, when a teacher desires to teach, this desire causes the teacher to create, contract, give.)