Many things affect our thinking, though you may not like it. But I like that you go to see your father every week and give him some time, even though you are now a stranger to him. I pray for your father. Really! Life throws us into strange situations at times, where only memories are playful.
I watched my mum fade away with cancer, and die quite horribly...My dad will be spared that it seems, but he will die not knowing his children and who he was in life. That makes me a bit sad. Thanks for commenting though, I know it's a sad post but it made me feel better writing it.