Two things come to mind: - When you have to explain something to someone else - and you wish to do it well - you're forced to rethink, reprocess, etc. The exer

Two things come to mind: - When you have to explain something to someone else - and you wish to do it well - you're forced to rethink, reprocess, etc. The exercise deepens your own understanding. - Our senses (and associated neural support) are weighted to the visual. Reading plays to that strength.