"'Tis the middle of night by the castle clock, 

And the owls have awakened the crowing cock;" (It foreshadows that a young woman is going to lose her virginity. This happens right before Geraldine appears.)

"Of the huge, broad-breasted, old oak tree." (Tree of Knowledge of Good and Evil)

"I saw a bright green snake

Coiled around its wings and neck." (Satan in snake form found at the tree)

"The silver lamp burns dead and dim;

But Christabel the lamp will trim...

While Geraldine, in wretched plight,

Sank down upon the floor below." (Vampire's are weakened by silver)

"Do love you, holy Christabel!...Fair maiden, to requite you well.

But now unrobe yourself; for I

Must pray, ere yet in bed I lie." (This is Geraldine deceiving Christabel, trying to take her purity and innocence.)

"And they rode furiously behind. 

They spurred amain, their steeds were white" (Their white horses symbolize the goodness or holiness of the men)

"And once we crossed the shade of night." (They are of the light, she is of the dark.)

Oak tree: Strength and protection

Mistletoe: Fertility and vitality

The oak tree is a symbol of protection, but that is where Christabel found Geraldine, the tree didn't do it's job.

"The lady sank, belike through pain,

And Christabel with might and main

Lifted her up, a weary weight,

Over the threshold of the gate" (It displays Christabel helping Geraldine).

"Quoth Christabel, So let it be!

And as the lady bade, did she.

Her gentle limbs did she undress,

And lay down in her loveliness." (Was she under a spell or just obeying)

"Collects herself in scorn and pride,

And lay down by the Maiden's side!—

And in her arms the maid she took"(This also diplays Christabel being willing but we also don't know if she is under the influence of Geraldine)

"And while she spake, her looks, her air

Such gentle thankfulness declare...

That He, who on the cross did groan,

Might wash away her sins unknown,"(This shows ambiguity as the 2 statements are controdictory)

"Puts on her silken vestments white" (White is usually a symbol of goodness, Geraldine contradicts this)

"'Tis the middle of night by the castle clock,

"Behold! her bosom and half her side— A sight to dream of, not to tell!"(physical and emotional passion)

"In the touch of this bosom there worketh a spell"

"A snake's small eye blinks dull and shy;

And the lady's eyes they shrunk in her head,

Each shrunk up to a serpent's eye,"

"For what she knew she could not tell,

O'er-mastered by the mighty spell."

(an interest in the mystic and supernatural)

Christabel suddenly stabs Geraldine with a wooden stake. Then she goes out into the rain and prays in front of the oak tree to have her sins washed away. Suddenly, lightning strikes the oak tree and she and the tree go up in flames.

Christabel stabs Geraldine with a stake to end the evil that had manipulated her. The rain symbolizes baptism as she attempts to repent. The her going up in flames represents a divine rejection of Christabel