“Sometimes you can’t prove whether you’re right or wrong. Only time can tell that. But if you believe in your own power to objectively reason, that’s a key to happiness. And a key to confidence. Another key I found to happiness was to realize that I didn’t have to disagree with someone and let it get all intense. If you believe in your own power to reason, you can just relax. You don’t have to feel the pressure to set out and convince anyone. So don’t sweat it! You have to trust your own designs, your own intuition, and your own understanding of what your invention needs to be.”