It's the people who have no difficulty getting into everyday trivial matters with the same interest as if it were for the first time, the moment they believe important that which is unimportant. This is how people should be in order to endure it. This is how one can see everything with a new perspective.
I don't think that you can control it. It is one of your components and it always manifests when you believe that it has gone forever. It seems that "for good" does not exist, no word with an extreme meaning lasts forever. The only words with duration are those such as "I think" or "maybe". "Never" does not exist and surely nor does "nothing". This is what I say now, but perhaps tomorrow things will be different. I constantly invalidate myself, it seems that this is my time, me who thought that I had reached a certainty. How ironic is that ...