Walter reminded me of a tree, an ancient oak tree.
He was a solidly built man, silent and observant. He seldom had much to say and yet he was always there on the periphery of the group, usually silent, and watching. When he did speak it had value.
I once told him that reminded me of an oak- strong, silent, and enduring. It was the wrong thing to say. Never tell an amputee he reminds you of a tree.