Keeping from me

At one already holding out
once I was one day old many voices said grow and that's what I heard
at one day old.
Took years to put it in letter
then to understand it.
when I finally did I told the world
I heard WHAT u said
when i was one day old
but I don't know why or if I should thank you
you left so much out and it's that why I shout
if at one you knew I will not understand then why not tell me the whole truth.
what if.
at one I knew.