Honesty is the only virtue which is so important that it is a temple recommend question. It is an attribute of perfection which is harder than it seems to master. To be perfectly honest and upright shows that the Ammonites had mastered the principle.
Brigham Young
"We need to learn, practice, study, know and understand how angels live with each other. When this community comes to the point to be perfectly honest and upright, you will never find a poor person; none will lack, all will have sufficient. Every man, woman, and child will have all they need just as soon as they all become honest. When the majority of the community are dishonest, it maketh the honest portion poor, for the dishonest serve and enrich themselves at their expense." (Discourses of Brigham Young, ed. by John A. Widstoe, p. 232)
Neal A. Maxwell
"Total morality must concern itself both with man's relationships with God and with his fellowmen. In Alma 27:27 we read of Church members of another age who were also distinguished for their zeal towards God, and also towards men; for they were perfectly honest and upright in all things...' These members looked upon the shedding of blood with 'the greatest abhorrence,' but they did not look upon death 'with any degree of terror' because of their 'views of Christ and the resurrection.' The gentleness and integrity that are borne of the perspective of the gospel are truly impressive when one sees them in others. In this fragment of history we see an impressive statement about an entire group who bore up under persecution in a time of tribulation without losing their love of God and man." (For the Power is in Them, p. 30)