claircognizance
It was like all of the sudden, out of nowhere, I had some insight into what had happened between them. A lightening bolt of claircognizance. It made my heart ache when I realized how hard he had tried. I can imagine feeling like you know somebody... And then they change slowly over a period of time, but also, right in front of your eyes... and before you have even realized what was happening, it is a stranger that has taken the place of the one you so loved.