Fetching details from the dictionary...
scattering of the blossoms and falling of the leaves; the impermanence of worldly things
飛花落葉の理を説く仏教の教えに触れた。
I encountered the Buddhist teaching on the impermanence of all things.
飛花落葉の移ろいに人生の無常を重ねた。
I saw the impermanence of life in the scattering of blossoms and falling of leaves.
飛花落葉の風景が詩人の感性を刺激した。
The scene of falling petals and leaves stirred the poet's sensibility.