[Joseph Smith preaches] ... So the devil thinking to thwart the decree of God by going up & down in the earth seeking whome he may destroy any person that he can find that will yield to him he will bind him & take possession of the Body & reign there glorying in it mightily not thinking that he had got a stolen tabernacle & by & by some one of Authority will come along & cast him out & restore the tabernacle to his rightful owner. But the bevil steals a tabernacle because he has not one of his own. But if he steals one he is liable to be turned out of doors.
...Now for the secret & grand key. Though they might hear the voice of God & know that Jesus was the son of God this would be no evidence that their election & calling was made shure that they had part with Christ & was a Joint heir with him. They then would want that more sure word of Prophecy that they were sealed in the heavens & had the promise of eternal live in the kingdom of God.
Then having this promise sealed unto them it was as an anchor to the soul sure & steadfast. ...
[Source: Wilford Woodruff's Journal: 1833-1898 Typescript, Volumes 1-9, Edited by Scott G. Kenney, Signature Books 1993, http://amzn.to/newmormonstudies]