Moses warns the people that when we think that what we have – our stuff – our herds – our homes, the silver and the gold – and that all this is our doing – we forget what Hashem has truly done for us, bringing us out of Egypt and slavery, providing water and manna, leading us to the fiery mountain of revelation, and the vision to do good inspired by the commandments. This drawing brings our past to our present with the things we have now and reminds us to be grateful for these really are gifts from Hashem.