In order to do what you'd like, I put each image/quote pair in a <div>
tag and added some bits of CSS code to each div to get the formatting closer to what you wanted.
I also removed the h4 heading from each quote since heading tags are something called "block" level tags that can't be wrapped around other elements like images. If you want them to be bigger, you can manually change their size in the Text window, like this:
Before:
<span style="color:#333399;">
After (adjust depending on the size you want):
<span style="color:#333399; font-size: 14px;">
Just let us know if you need more help.