I Am Malala: The Girl Who Stood Up for Education and Was Shot by the Taliban. In the interview, Malala is quoted as saying, "Books can capture injustices in a way that stays with you and makes you want to do something about them. That's why they are so powerful."
For me, this rings true. Books... words... ideas... are so influential because they linger in our thoughts and in our minds. But in my opinion, it's not enough to simply think about the issues, we should also do something.