the hymn my grandmother taught me

I'm sitting here remembering a hymn my grandmother taught me. I remember how when she summoned, yes summoned. Because my old back home never quite called for you but they summoned you. You had no option but to appear. They called you and you appeared, it was really that simple. So I'm still here thinking about that time she summoned myself and all the children who were in the house at that time. She asked us to get a pen and paper and began to recite the words of the hymn to us. The hymn is one I sing now. One I didn't understand then. One that has only begun to make sense now.

"On Christ the Solid rock I stand all other ground is sinking sand..."

Thats part of the hymn. This hymn only makes sense now. It never did then. When she summoned us then. And she sang in her "only for the church walls voice". She wasn't much of a singer. Thank you Grandma.