Quote: "To sum up his talk here, he talks about inventing on principal–something you believe in." Actually, I'm pretty sure he recommends investing on principl

Quote: "To sum up his talk here, he talks about inventing on principal–something you believe in." Actually, I'm pretty sure he recommends investing on principle. http://www.merriam-webster.com/dictionary/principle http://www.merriam-webster.com/dictionary/principle Quote: "a moral rule or belief that helps you know what is right and wrong and that influences your actions" http://www.merriam-webster.com/dictionary/principal http://www.merriam-webster.com/dictionary/principal Quote: "most important, consequential, or influential : chief <the principal ingredient> <the region's principal city>"