I have always known everything. I never told my grandfather about this fact but I have seen first hand every single situation as they happened, heard every single word as they were uttered and felt every single pain and heartbreak that my father felt. I think it even started from the time I was conceived inside my father's womb.
I myself do not know or have any explanation as to how it became possible for me to have this ability. I am very sure that the memories I currently have were not just part of some dream or hallucinations because everything was so vividly clear in my mind, even till now when I try to remember them.