Ray Bradbury (1920-2012) was an American writer best known for his contributions to science fiction. The rest of this post is some quotes from Bradbury.
Ideas
"Science fiction is the fiction of ideas. As soon as you have an idea that changes some small part of the world you are writing science fiction. It is always the art of the possible, never the impossible." (The Paris Review Interview, 2010)
"I just can't imagine being in a world and not being fascinated with what ideas are doing to us." (The Paris Review Interview, 2010)