I love using graphic novels and comic strips in the classroom. Here is a great site that I have used a few times, created by talented artisit Gavin Aung Than. Cartoon strips created using inspirational quotes and poems. The most recent one is a quote from fellow Australian Tim Minchin talking about being hard on your opinions. Click on the picture for the full version.
I have also used this one on Malala Yousafzai for my JMUN club. Click on the picture for the full version.
There are tons of great quotes on here as well as poetry. You can also download some free posters for you classroom.