Compare Emerson and Thoreau. How does Thoreau's work benefit from Emerson's? In what way does Thoreau differ from his mentor?

Compare Emerson and Thoreau. How does Thoreau's work benefit from Emerson's? In what way does Thoreau differ from his mentor? As you explain, compare, and consider, describe Transcendentalism. 

Essays by Emerson include: Nature and Self Reliance