Back when I was in academia, one of my favorite student evaluations from an abstract algebra class had the following comment (paraphrased from memory):
"This course was like climbing Mt. Everest. It's difficult, and sometimes slow going, but at the end, it's breathtaking how much you've learned and accomplished."
"This course was like climbing Mt. Everest. It's difficult, and sometimes slow going, but at the end, it's breathtaking how much you've learned and accomplished."