why does what was beautiful shatter in hindsight because it concealed dark truths?

The tectonic layers of our lives rest so tightly one on top of the other that we always come up against earlier events in later ones, not as matter that has been fully formed and pushed aside, but absolutely present and alive. I understand this. Nonetheless, I sometimes find it hard to bear.

Why? Why does what was beautiful suddenly shatter in hindsight because it concealed dark truths? Why does the memory of years of happy marriage turn to gall when our partner is revealed to have had a lover all those years? Because such a situation makes it impossible to be happy? But we were happy! Sometimes the memory of happiness cannot stay true because it ended unhappily. Because happiness is only real if it lasts forever? Because things always end painfully if they contained pain, conscious or unconscious, all along? But what is unconscious, unrecognized pain?

What is law? Is it what is on the books, or what is actually enacted and obeyed in a society? Or is law what must be enacted and obeyed, whether or not it is on the books, if things are to go right?

Or is there no such thing as 'too late'? Is there only 'late' and is 'late' always better than 'never'? I don't know.

Does everyone feel this way? When I was young, I was perpetually overconfident or insecure. Either I felt completely useless, unattractive, and worthless, or that I was pretty much a success, and everything I did was bound to succeed. When I was confident, I could overcome the hardest challenges. But all it took was the smallest setback for me to be sure that I was utterly worthless. Regaining my self-confidence had nothing to do with success...whether I experienced it as a failure or triumph was utterly dependent on my mood.

There's this old saying that, if you aren't particularly gifted in natural sciences, if you don't want to become a teacher or pastor or doctor, and don't know what else to do, then you become a lawyer. But I've never regretted it.