Correlative conjunctions are found in pairs<span />
He cares more about preaching to his audience than entertaining them.
He is a simple person that only sees the world in absolutes.
He loses himself in the sermon he is preaching to the audience
I would assess this info in the context of the work expected from them. Are they building websites for you? While the site appearance does reflect somewhat on their image, it may have little or nothing to do with their value otherwise.
Whittier used "We" and "Thou" as forms of repetition in his song of slaves in the desert.
We: He used we as to show that basically slaves WERE NOT alone in this at all. In a way at that time, every single slave was connected with each other no matter what.
Thou: From what i have seen, Whittier is using "Thou" to refer to God. For example: "We are fools, but Thou art wise"
For the devices, he's using Anaphora for "Thou" and maybe Conduplicatio for "We".