Riddle Me This..

I will show up once in a minute
And twice in a moment
But never in a hundred years
Mmmm, think about it

Hear me, hear me
But never will you see me
I won't speak unless spoken to
Let me echo through your heart

Feed me food and I will thrive
But give me water and I will die
I yearn with a burning desire
With just the fire in my soul

I am alive when there is light
I also die when there is light
But somehow I still I exist
Beyond a shadow of a doubt

I can only exist in the past
But I am made in the present
And the future can never change me
The rest is history

•••

The letter "M", an echo, fire, a shadow, and history? I'm just guessing...

a reply to: MisterMcKill

I agree with you except for the last one which I believe is memories...