The poem is built like a list of cause and effect. Each pair of lines names something and the force that acts on it: trees tilt in wind, flowers wilt in drought, skin wears against soil, a mind tears under madness. The pattern is simple and almost chant-like, which makes the losses feel natural and unavoidable.
The second half moves from nature to people. Flames drown in water, smiles turn to frowns, and then the last two stanzas hit harder. A body "will die" to beauty, while the ugly "will thrive" to death. The final twist suggests that beauty and decay don't play fair, and that something unpleasant may outlast something lovely. The speaker's exact attitude is left open, but the tone seems bitter and resigned rather than angry.
The mood is cold and fatalistic. Short lines and tight rhymes (tilt/wilt, wears/tears, drown/frown) give it a clipped, final sound, as if the speaker is simply stating how the world works. The title's farewell fits that mood.