Buffon, writing in "Histoire Naturelle", published in 1753, questioned whether it could be doubted that animals "whose organization is similar to ours, must experience similar sensations" and that "those sensations must be proportioned to the activity and perfection of their senses". Despite these assertions, he insisted that there exists a gap between humans and other animals. In the poem "Poème sur le désastre de Lisbonne", Voltaire described a kinship between sentient beings, humans and other animals included, stating: "All sentient things, born by the same stern law, / Suffer like me, and like me also die."