The Holy Ghost as the Holy Spirit of PromiseHarold B. Lee
Now, what does it mean to be sealed by the Holy Spirit of Promise? ... Now, that is the promise which is put into our hearts by the Holy Ghost when we have been sealed because of the kind of life we have lived here, the use we have made of our priesthood, the temple covenants which we have been true to, true to the covenants we made in the waters of baptism. When that is sealed upon us by the Holy Spirit of Promise through the Holy Ghost, then we have a right to eternal life in the celestial kingdom.
The Holy Spirit of Promise is the Holy Ghost, which searches the hearts of men, one who reads our thoughts and our doings, and until He gives His sealing approval, then only will our blessings be efficacious and of full force when we are out of this world. (The Teachings of Harold B. Lee, p. 15)Joseph Fielding Smith
The Holy Spirit of Promise is the Holy Ghost who places the stamp of approval upon every ordinance: baptism, confirmation, ordination, marriage. The promise is that the blessings will be received through faithfulness.
If a person violates a covenant, whether it be of baptism, ordination, marriage or anything else, the Spirit withdraws the stamp of approval, and the blessings will not be received.
ordinance is sealed, with a promise of a reward based upon
faithfulness. The Holy Spirit withdraws the stamp of approval where
covenants are broken. (Doctrines of Salvation, 1:45)
James E. Faust
I wish to say a word about the Holy Spirit of Promise, which is the sealing and ratifying power of the Holy Ghost. To have a covenant or ordinance sealed by the Holy Spirit of Promise is a compact through which the inherent blessings will be obtained, provided those seeking the blessing are true and faithful (see D&C 76:50-54). ... To have a covenant or ordinance sealed by the Holy Spirit of Promise means that the compact is binding on earth and in heaven. ("The Gift of the Holy Ghost--A Sure Compass," Ensign, Apr. 1996, pp. 5-6)