Words heard in the night

Having dealt with the effects of trauma I began to pray
And then went off to sleep and was awakened in this way
Some words kept on repeating and an instrument was played
So I am sharing them with you: below they are displayed:

"I will be your first and I will be your last

I will be your memories : I will be your past

I will be your answers : I will be your way

I will be your everything forget not what I say"