I got a question for you: Cynewulf lived roughly c. 770 -- 840 AD, yet very little is known about his life. The only information scholars have on Cynewulf's life is what they can discover from his poetry. Two of Cynewulf's signed poems were discovered in the Vercelli Book, which includes Cynewulf's holy cross poem "Elene" as well as Dream of the Rood. Where many scholars will argue that all of the poems in the Vercelli are in fact Cynewulf's, the noted German scholar Franz Dietrich demonstrates that the similarities between Cynewulf's "Elene" and The Dream of the Rood reveals that the two must have been authored by the same individual. Dietrich makes four main arguments: one, the theme of both poems is the cross, and more importantly, in both poems, the cross suffers with Christ; two, in "Elene" Cynewulf seems to make clear references to the same cross in Dream of the Rood; three, in "Elene" and his other poems Cynewulf usually speaks of himself, which makes it quite possible that the dreamer in Dream of the Rood is none other than Cynewulf himself; and finally four, "In both poems the author represents himself as old, having lost joys or friends and as ready to depart.

Based on this passage, who is the dreamer in the dream of the rood?
Let's think first:
To answer the question, consider the following: Dietrich makes four main arguments: one, the theme of both poems is the cross, and more importantly, in both poems, the cross suffers with Christ; two, in "Elene" Cynewulf seems to make clear references to the same cross in Dream of the Rood; three, in "Elene" and his other poems Cynewulf usually speaks of himself, which makes it quite possible that the dreamer in Dream of the Rood is none other than Cynewulf himself; and finally four, "In both poems the author represents himself as old, having lost joys or friends and as ready to depart.
Therefore, the answer is Cynewulf.