Good vs Great

What does mean by good and great….?

Take an example of a man in the past who did eat food uncooked. If he had used the same for the years could this world had mad the innovation to the world of the modern age…..? No! Never. Because they thought of something new in their lives and they thought of something new in their lives and that is why this world came to this stage. And it is not the matter that they were not good with the food. They were good with their lives but they thought creatively and did something that was great and that was the matter because of which we are here in the modern world.