What is the fine-grained topic of the following text: The windows of his study looked out on the graveyard but, as he paced up and down the room, reflecting deeply on the immortality of the soul, he was quite unaware that Jerry and Carl were playing leap-frog hilariously over the flat stones in that abode of dead Methodists. Only return the topic.
Deep reflection on immortality amidst obliviousness to children's play in a graveyard.