Brigham explains that whether we are given to good or evil in life, we will enter the spirit world with that same disposition.
Brigham Young, "Progress in Knowledge, &c.," October 8, 1859, Journal of Discourses, 26 vols. (Liverpool: Amasa Lyman, 1860), 7:333
Suppose, then, that a man is evil in his heart—wholly given up to wickedness, and in that condition dies, his spirit will enter into the spirit world intent upon evil. On the other hand, if we are striving with all the powers and faculties God has given us to improve upon our talents, to prepare ourselves to dwell in eternal life, and the grave receives our bodies while we are thus engaged, with what disposition will our spirits enter their next state? They will be still striving to do the things of God, only in a much greater degree—learning, increasing, growing in grace and in the knowledge of the truth.