For more about the power of writing, see this great blog post at Lifehacker: How Writing Makes People Smarter by David K. William
Here are the topics covered in that article:
1. Writing helps us untangle the messiness in our minds and allows for clearer thinking.
2. Writing helps us absorb information better and learn significantly more.
3. Writing helps us process negative feelings and improves our emotional intelligence.
I made the image with cheezburger.