What does the fortune the greater part of inspiration is perspiration?

If you are asking what this saying means then it means that inspiration usually doesn't just come to you if you sit around and wait for it. If you have an idea of something you have to go out and work for it until it comes true, like Thomas Edison making a better light bulb. He didn't just get the inspiration of how to do it right, he had to try over and over again until he got it.