Only a fully trained Jedi knight with the Force as his ally will conquer Vader and his emperor. If you end your training now—if you choose the quick and easy path, as Vader did—you will become an agent of evil.
Leigh Brackett (1915–1978), U.S. screenwriter, George Lucas (b. 1944), and Irvin Kershner. Yoda (Frank Oz), The Empire Strikes Back, urging Luke Skywalker to continue his training rather than join his friends in battle (1980).