Bernie Sanders channels rabbi Hillel
If you don't know the apocryphal story, here's an example from NPR:
A man asked Rabbi Hillel to teach him the entire Torah, the five books of Moses, while standing on one foot. And Hillel did. What is hateful to you, do not do to your neighbor. That's the whole Torah, he said. All the rest is commentary. Now go and study.
http://www.npr.org/templates/story/story.php?storyId=129706379