If you say something enough, you might just end up believing it. No matter how ridiculous. So, what if you write it over and over again? Will you believe something that you write over, and over, and over again? Or is writing different than speech in its very nature? Writing leaves a physical trace and is therefore inherently more permanent. We are aware of our words' permanence, and choose more carefully the form our thoughts take in the physical world. Speech is automatic, and thoughtless. Writing causes the mind to look forward and backward at once.