TEETERING ON THE VERY BRINK

so the song starts with 4 lines, as follows

Children, know that if you will abide by the sacred rite with great commitment There will be a reward through the Holy Blood You will be rewarded with the hidden Holy Blood Or, maybe I shall lose my humanity through the Holy Blood

already starting off strong with the "questioning one's faith" vibes, eh, larry?

"children" might be in reference to actual children, or it might be the thing priests do, where they're called "father" and stuff (can you tell i'm not christian?) with laurence in this case being the "father" and the disciples of the church being his "children"

the reward from the holy blood is, of course, ascension, which we all know everyone from byrgenwerth strived for, because they're losers. "hidden holy blood" might be in reference to ebrietas bein all locked up in the chalice dungeons?

"maybe i shall lose my humanity through the holy blood" is, based on how early it is in the song, likely about laurence looking forward; loss of humanity is seen as a good thing, because it means ascension. the dramatic irony of this is of course obvious, considering the song plays when we're beating the shit out of laurence's fallen and bestial form - because loss of humanity can also mean other things, it turns out.

We honor you with the Blood Yet you judge this as blasphemy You are obsessed with this mystery And you shall be overcome by bestiality

We honor you with the Blood Yet you judge this as blasphemy We are hindered by this mystery Water does not achieve success

now laurence is speaking to the gods instead of to his followers. "we honor you with blood / yet you judge this as blasphemy" is likely him pleading to the gods. the description of the defiled chalice reads, "Curses are caused by inciting the anger of the Great Ones, and used to hex others." this paints a picture of the gods as somewhat vengeful; it makes sense that the beastly scourge, then, would be hypothesized to be a plague cast upon humanity for some sin they've committed, and laurence would know best what exactly that sin is.

"you are obsessed with this mystery / and you shall be overcome by bestiality" seems out of place in the rest of this section, given it's the only one that refers to humanity as "you," but i've taken this as it being the gods replying to laurence in the song, with the mystery likely being "how to ascend to godhood". this is the blasphemy you have committed, they say, and you shall be overcome by bestiality

"we are hindered by this mystery" once again, we're talking from laurence's perspective. firstly, laurence for the first time admits that obsession with ascension might not be so great, actually.

"water does not achieve success" this could be interpreted as talking about the whole "great bodies of water are often bulwarks" thing discussed in the lake and sea runes, laurence sort of saying "protecting ourselves from the truth does nothing to help us ascend," with water, effectively, being "safety." to go further, in my personal interpretation, this is more about the comparison of blood and water. you know that old saying, "blood is thicker than water"? that came to mind immediately while reading these lyrics, given the constant talking about blood in the song (and in the game). perhaps here laurence is comparing water to blood with water, water being "safety" and blood being "success" (ascension). to reference the item description for the white church set, "They believe that medicine is not a means of treatment but rather a method for research, and that some knowledge can only be obtained by exposing oneself to sickness." this will come up later.

By the Gods, friend Be afraid By the Gods, friend The Blood Be afraid You are right to

this is familiar! this could be willem speaking, this could be laurence speaking to someone else, or this could be laurence speaking to himself (my writer's brain imagines him muttering this quietly to himself in despair as his mental health and questioning of his faith declines) - due to "you are right to [fear the blood]," i lean towards him talking to himself as if talking to willem, perhaps wishing he had actually feared the old blood, or saying that willem is better off for doing so. regardless, it is incredibly reminiscent of the sacred adage ("fear the old blood" etc etc we all know it by heart at this point), and is likely supposed to be that.

It will be a majestic festivity By the Holy Blood So come, this sweet wine O defiled juice (this has to mean "wine" or "drink" i refuse to believe laurence would refer to the holy blood as a juice. i will not allow it)

this one, oddly, seems to indicate a toneshift - i would argue it's a result of his spiraling mental state. throughout the song he's questioning his faith and his actions, chanting his old mentor's sacred adage to himself; his life up to this point is a life of success while the cure and path to ascension he was peddling to yharnam turns them into horrific beasts. so he ends up doubling down on the religious fervor he started this endeavor with. this delves more into headcanon territory, so bear with me for a second:

have you ever thought about why laurence drops the beast's embrace rune?

laurence, the first vicar, the first cleric beast, drops the rune that allows you to enter a state of controlled beasthood whenever you want (provided you use a beastly weapon, of course). isn't that odd? shouldn't he drop something that, like, increases the amount blood vials heal you? maybe super duper extra special communion +6? why would he drop that rune, of all things, especially when the game already has a named character they could've put in to drop it (that being irreverent izzy)?

let's look at the item description.

After the repeated experiments in controlling the scourge of beasts, the gentle "Embrace" rune was discovered.

When its implementation failed, the "Embrace" became a forbidden rune, but this knowledge became a foundation of the Healing Church.

now i am not necessarily going to suggest that laurence dreamed up the beast's embrace rune himself - it could make sense, but that isn't necessary for the rest of what i'm about to say, which is this: the last part of the song is laurence giving into beasthood voluntarily.

perhaps he believed so strongly in the blood of ebrietas taking him to ascension that he decided beasthood must be it, must be the next step for humanity; perhaps, in a final move of desperation, he tried to control beasthood by experimenting on himself with this rune; or perhaps he had already imbibed so much of the old blood that he couldn't control his need to spill the blood of others.

personally, i lean toward the second interpretation. let's look at the description of laurence's (human) skull:

Skull of Laurence, first vicar of the Healing Church. In reality he became the first cleric beast, and his human skull only exists within the Nightmare.

The skull is a symbol of Laurence's past, and what he failed to protect. He is destined to seek his skull, but even if he found it, it could never restore his memories.

firstly, i'd just like to point out the irony in the statement "he is destined to seek his skull"; he spends his human life seeking ascension, and when he achieves metamorphosis, he is cursed to spend that form trying to find his humanity again, mindless, lost in a nightmare.

secondly, and more to the point, let's look at the line "a symbol of laurence's past, and what he failed to protect." examining this item for its symbolism is fairly clear - it's a relic of laurence's humanity, and that's exactly what he failed to protect, the humanity of himself and others. this description leads me to believe he wanted to protect humanity, but failed.

a lot of interpretations of him have him as this truly evil person who was just deceiving the city of yharnam for his own personal gain, but honestly, i don't buy that. that's not what bloodborne is about. i mean bloodborne is and can be about a lot of things, and i could ascribe dozens of basic thematic interpretations of it off the top of my head, but characterization that simple doesn't fit bloodborne (and, frankly, it's not tragic enough for miyazaki).

so, with all that combined, why do i believe that laurence branded himself with beast's embrace in an attempt to further research on the control of beasthood, so as to protect humanity? well, to go back to an item description from earlier, some knowledge can only be obtained by exposing oneself to sickness.