And in order to obtain the highest, a man must enter into this order of the priesthood [meaning the new and everlasting covenant of marriage];Doctrine and Covenants 131:1-2
Putting a staircase in the celestial room in a temple is such a great way to visually remind us of this principle. I've only seen a few such staircases. The most interesting ones are grand staircases leading to upper levels in a celestial room. I only know of two. Here are pictures of them:
|San Diego California Temple Celestial Room|
|Portland Oregon Temple Celestial Room Staircase|
Other temples have less grand, but still really nice celestial room staircases. Below are staircases in the St. George Utah Temple and Salt Lake Temple. Each leads to a sealing room. The Salt Lake Temple staircase has a statue of Cupid as a symbol of love on the bottom post.
|St George Utah Temple (left) and Salt Lake Temple (right) Celestial Room Stairs|
|Manti Utah Temple Celestial Room|