"Once you've learned to use it" must indicate that you've mastered something, and once you've mastered this thing you could maybe evolve it and keep evolving it as said in this qoute "there's no end to what you can do" since you've already mastered it.
I'm not sure about this answer but I tried my best to help.
If you don’t learn history you are condemned to repeat it. Children sometimes don’t learn and repeat bad things so not learning history is kinda like that.
