Write this in own words:

i wish i had words to comfort and sustain you in your grief, but i know there are none that will take away any pain you are feeling now.

I don't have the words to comfort you in your sorrow, I know there will be nothing that will try to take away the pain your feeling right now.

Original:

"I wish I had words to comfort and sustain you in your grief, but I know there are none that will take away any pain you are feeling now"

My version:

"Watching you suffer is the last thing I'd want to do. But here I am. I wish I could comfort you and make you remember the good times, but in this moment, I think it's best to let you overcome the pain and let it all out. For now...I give you my condolences."

Hope this helps!