Did you ever have a breakthrough of understanding after working hard at something? Explain

Yes of course. Learning never ends and we learn by failing and also by teaching others. I have had a hard time on a particular project finding it difficult to surmount, I had to seek help and someone who has been with much experience had to explain more of the solution to me, though it was tough but at the end I was able to do it and this gave me so much joy because not only that i did that but I also was happy to know another better way to handle such when next am facing something like that project.