Often, in the interest of time, We look at proofs done by others. It could be on stack, in a textbook, or shown by a friend. In all cases, you don't get the same amount of mental compression of the proof as you do when you do it yourself.
It's one thing to be able to reproduce the proof after careful study of the logic, but there's always a nagging feeling that it was an idea that was inplanted in your head. (Reference to Inception)
Is this just part of the inevitable process of learning from others or is there a way to make a proof your own? Any thoughts?