Why is the Invocation, or the first 26 lines of Paradise Lost important? What is Milton's purpose in invoking his muse? What are the special qualities of Milton's heavenly muse? What is the central theme of Paradise Lost? This video takes you through every line of the Invocation to help you understand these questions. This video is a simple but detailed explanation of the epic's central theme, Milton's experimentation with conventions and the purpose behind the first 26 lines of the epic "Paradise Lost".