Afront (in front of) the bed, the Luna (the moon) beams (shines) bright, Wearing a look of seemingly rime white (it looks frost-coloured white). Eyes upcast (looking upwards) toward the Luna (at the moon), Eyes downcast (looking down), engenders (gives birth to) my nostalgia (emotional feelings about the past).

Hi Elsa. A muse is a personified force —the moon in this case— who is the source of inspiration. Here is my interpretation of your beautiful poem: The moon has an immense power of attraction over the earth and all the creatures that inhabit it. Its amazing, wonderful light can illuminate your thoughts and emotions, no matter how deep they are stablished inside you, helping you to engender your feelings.