A, B, C...then what?

One dear friend once asked me to figure out a new letter. I thought about it for a while and pronounced silently for myself but noticed that all I ever did was repeating the same old pattern, the same letters that already existed. I was really trying to make a new letter but I didn't make it. 

Then I realized how limited my mind is. But after that I realized that it isn't limited, I just don't use it all.

What if we used all of our capacity? What would the world be like?