It takes a fraction of a second to be hit with a life-changing idea that could possibly alter the course of history and social-economical development all around the world. It requires little effort at all as most times they come to us as inspirations; gifts form the gods. But guess what, it takes even far lesser effort far, lesser time for an idea to remain what it is; just an idea.
Ideas are foundations on which the world was built, it is from them that we have been able to make so many advancements technologically and economically wise. Imagine if no one absolutely no one had all conceived the idea of bettering the transportation system, we would have still been riding horses and jousting. Now imagine if after conceiving the idea of a motorcycle or a bicycle or a car, the owner of the idea just decides to stay idle and let the ideas manifest itself. What a tragedy that would have been.
Now this applies to you. In a progressive world marred with so much erratic changes ideas literally hit us every second while we are walking on the road, bathing under the shower or having conversations with someone.