The path of a maturing thinker. In order to get to Grown-Up Mountain and start real learning, you have to brave the cold winds of Insecure Canyon. If you're not willing to say "I don't know" for a while, you might spend your whole life on Child’s Hill. pic.twitter.com/8YT6emJcB3

— Tim Urban (@waitbutwhy) January 6, 2020