Sometimes you think you cannot understand a person/concept more. She's my mom, I know everything about her ! I invented this algorithm, and worked on it for 10 years, how could I not understand all the finer points? And then you get surprised :) And its such an awesome surprise, to know that no matter how deep you go, there is still more depth. Some mystery is unveiled, but only to remind you that there are many more to come - the layers remain.