When she gets there she knows, if the stores are all closed
With a word she can get what she came for
Ooh, ooh, and she's buying the stairway to heaven

from Led Zeppelin – Stairway to Heaven Lyrics on Rap Genius

The “Word” is one of Christ’s Names. According to “Gospel of John — Chapter 1”, the word is the antecendent event of the universe.

If she hasn’t found entry with her payment to priests, the Name of Jesus may work for her.

She thinks when she arrives at the Gates of Heaven, if her good deeds won’t get her in, her belief in God/Jesus will.

The Protestant Reformation evolved to believe that only faith in God/Jesus would get one in heaven. This deviated away from the Catholic belief that salvation could come through indulgences/good behavior.

“Word” is used in the Bible to symbolize God and Jesus (John 1:1) —

“In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning.”

(John 1:14) —

“The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the One and Only, who came from the Father, full of grace and truth”

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