Final answer:
In 'A Grief Observed', C.S. Lewis finds that memories of his wife, H. (Joy), become clearer when he stops trying forcefully to remember her, which is true.
Step-by-step explanation:
The statement in the question is True. In A Grief Observed, Part III, C.S. Lewis discovers that when he ceases his desperate attempts to remember his wife, known as H. (Joy), her memory becomes more vivid and real to him. This change reflects a common psychological phenomenon where relaxed and passive mental states can sometimes allow for a more natural and organic recollection of memories, as opposed to forced remembrance which can feel artificial and distant.