I once had a substitute teacher in my 4th grade class that was wonderful. He said learning was like throwing mud on a wall. Some will stick, and some will fall off. But if you keep throwing the mud on the wall, eventually the whole wall will be covered in mud. I think writing is very much the same. You have to keep at it. Some will stick, and some will fall away, but you keep writing, and eventually, you've impacted thousands, maybe hundreds of thousands of people with your vision.