The definition of an idea, as defined by Webster’s Dictionary, is something you imagine in your mind; an opinion or belief; a thought, plan, or solution on what to do.  Ideas present challenges in the sense that people can have ideas which are great in their minds, but the people who originate the ideas allow their own doubt to keep them from manifesting into something tangible, into something real, into something legendary.  One of the themes in Shoe Dog, the memoir written by The Great Phil Knight, is having a crazy idea and having the determination to see the idea come to fruition.