Fun is one of the most important - and underrated - ingredients in any successful venture. If you're not having fun, then it's probably time to call it quits and try something else.
Richard BransonThere are millions of people out there who would love to become astronauts, who'd love to go to space - they'd love to look back at this wonderful world from space. That will be the engine that will enable us then to develop spaceships to transport people around the world at tremendous speeds in an environmentally friendly way.
Richard Branson