Can you guess the one thing no one can take from you? If you said learning , knowledge , or education , you've hit the nail on the head. People can break into your house and steal your jewelry. They can snoop through your drawers at work and snag the million dollar idea you wrote on a post-it note. But no one can magically teleport into your brain and pilfer your knowledge. What's in the mind stays in the mind. That's why we should all aim to nourish our minds with as much information as we possibly can. The more we learn, the more we enrich ourselves. Human beings have a tendency to want to conserve their mental resources wherever possible. But thinking critically keeps the brain sharp, whether we're playing Scrabble or dreaming up ways to get a new business off the ground. Leonardo da Vinci once said, "Learning is the only thing the mind never exhausts, never fears, and never regrets." Fortunately, you're never too young or too old to lea...