Here's how the mood is created:
* Melancholy Language: The poem uses words like "stop all the clocks" and "let the traffic cease" to create a sense of stillness and profound sadness.
* Repetition: The repeated phrase "He is dead" emphasizes the finality of death and the speaker's overwhelming grief.
* Imagery: Auden uses vivid imagery like "the morning light" and "the stars are out" to create a contrasting backdrop of beauty against the speaker's pain. This juxtaposition further emphasizes the depth of their loss.
* Personification: The speaker addresses the deceased directly, and even instructs the world to mourn with them, further highlighting the immense loss they are experiencing.
The poem is a powerful expression of raw, unadulterated grief. It doesn't shy away from the pain, but rather embraces it, making the reader feel the weight of the speaker's loss.