Involving an artistic integration of poetry and philosophy, philosophical poetry is linked to a fundamental aesthetic issue. Classical Chinese philosophical poetry often expresses reflections through natural scenes and phenomena, which themselves are underpinned by multiple levels of philosophical meaning, such as "unity of Heaven and humankind" and "the Way". Through concrete textual evidence, this essay analyses various kinds of inner-worldly and other-worldly illumination offered by Nature in classical Chinese philosophical poetry. Negative examples (e. g. "abstruse-language poetry") are used to explore how philosophical poetry can express illuminating reflections with an artistic appeal, and so exude a philosophical relish. This essay also outlines differences between Chinese and Western philosophical verse in verbal structure, reasoning mode and aesthetic orientation, pointing to some degree of cultural distinctiveness in the aesthetics and artistic landscape of classical Chinese philosophical poetry.