Lao Tzu said that without going anywhere, one can know the whole world; Without looking out of the window, one can see the way of heaven and that the further one goes, the less one knows. It is better to travel with a pocketful of feathers than a large stone on one’s back. No, we don’t have to know everything; we don’t have to understand everything. Your mind isn’t big enough to get itself around everything. Just make sure you understand what is truly important and what your place in the universe is.