You know what it's like to wake up in the middle of the night with a vivid dream? And you know that if you don't have a pencil and pad by the bed, it will be completely gone by the next morning. Sometimes it's important to wake up and stop dreaming. When a really great dream shows up, grab it.
I think it is often easier to make progress on mega-ambitious dreams. Since no one else is crazy enough to do it, you have little competition. In fact, there are so few people this crazy that I feel like I know them all by first name.
The moments that we have with friends and family, the chances that we have to make a big difference in the world or even to make a small difference to the ones we love, all those wonderful chances that life gives us, life also takes away. It can happen fast and a whole lot sooner than you think.