A concept of time

Im familiar with the theory and i do believe they (past, present, and future) exist all at the same time. I believe that they are just in an alternate universe. But then you wouldnt call it a "uni"verse it would be a "multi"verse. But if a certain event were to be changed in the past it would alter the now.

Have you ever heard the Grandfather Paradox?
If not, here it is......

Say i went back in time and killed my grandfather, that would mean i was never born, but if i was never born how was i able to kill him?

"But if a certain event were to be changed in the past it would alter the now".

No, because the event is its own now. Still happening. In this concept there only ever is a now.

Actually lilfender, to expand upon your point and your mention of the multi-verse system, if it did indeed change the now, which one would it change?

And do we drift between these multi-verses without even knowing it?

If one believes in the idea of reincarnation then your spirit has lived many lives. So if you killed your grandfather then you might just be born into a different life. There are other possibilities. Perhaps if you went back in time it would become your present and not your past. Killing your grandfather would cut off your link to the normal time for you and therefore you would be stuck in that time forever.

I see where you are coming from. I didnt account for "it" being its own "now." But my question is, If i went back in time and did kill my grandfather, that would mean my parents were never born, and i was never born how could i have even done it?