Walter Isaacson

I was concerned that if I didn’t study business, I would be forced to work for someone who did

we must have inspiring things in the world.” Life cannot be merely about solving problems, he felt. It also had to be about pursuing great dreams. “That’s what can get us up in the morning.”

Unless this fourth launch attempt succeeded, it would be the end of SpaceX and probably of the wacky notion that space pioneering could be led by private entrepreneurs. It might also be the end of Tesla. “We wouldn’t be able to get any new funding for Tesla,” Musk says. “People would be like, ‘Look at that guy whose rocket company failed, he’s a loser.’ ”

Antonio Gracias tried to cheer everyone up by saying how the best lessons in life come from failures. “Given the options,” Musk replied, “I prefer to learn from success.”

Rockets that could hop up and back to the edge of space might be fun for space tourists, but it would take rockets with the power of the Falcon 9 to do missions such as launching satellites and reaching the International Space Station. Landing and reusing such a rocket would be an accomplishment of a different order of magnitude.