What a lovely response and what great advice.
I love the sack analogy, its perfect and you describe exactly how I felt when my own mum died suddenly 4 years ago.
Those early stages of grief are brutal and I remember thinking that I would never ever smile again, or be happy ever again and that my life would never be the same. I honestly couldn't see how I could ever recover. BUT little by little, I started to feel a little less heavy and burdened by it.
Grief counselling helped me massively. My bereavement counsellor was worth every penny I paid her. She listened to me intently, allowed me to be quiet when I needed to, encouraged me to talk about my Mum and help me understand my grief and the steps to take to navigate my way through it. I felt like she held my hand through the process and pulled me out the other side.
At the end of our sessions I felt I could see a way forward. I could see a future without my Mum in it and for once not feel broken and sad and full of dread. During the end of the process I was able to turn all my negative feelings and thoughts into positive ones and instead of think of her and feel sad, I would think of her and feel utterly utterly grateful that I had her as my Mum. I was grateful for all the times we shared, all the love we had, for the Mum she was, for the Nanny she was and that this wonderful human being was part of my life for as long as she was.
You may not feel that way now, but hopefully one day you will look at and see things differently to the way you do now.
I am so so sorry for your massive loss.
Please be kind to yourself and know that the deep grief you feel now will one day be less. You WILL get there. It does get better, I promise.