“It’s okay not to know all the answers. It’s better to admit our ignorance than to believe answers that might be wrong. Pretending to know everything closes the door to finding out what’s really there.”—
Neil Degrasse Tyson’s Cosmos: A Spacetime Odyssey
This is a great show, and if you aren’t already, try to find a way to watch it. If you already are or are interested, also check out startalkradio.net. Dr. Tyson is one of my greatest inspirations.