Someone help me with this pls

1) Pale (is a world he uses to visually describe something)
2)Bright (is a world he uses to visually describe something)
3) “My heart was once full of light” (Was once full of light, light is often used to define happiness and the title of this poem is “sadness” this line refers to happiness going away which would soon be sadness)
4) moon
5)sun (the pictures are a big help they show the moon and sun, and it is a main thing that he refers to in this poem)