Money
Nephites became proud because of their riches, which ought not to be.
"before ye seek for riches, seek ye for the kingdom of God"
In what manner it is appropriate to use/seek riches.
"But ... if they labor for money they shall perish."
"love of money is the root of all evil"
Joseph Smith told that he was to be tempted, because of his family's poverty, to obtain the gold plates for the sake of getting gain.
- Enoch 46:7
"Their power rests on their riches ..."
"Woe to you, ye rich, for ye have trusted in your riches ..."
"Woe unto you, ye sinners, for your riches make you appear like the righteous ..."
"Woe to you who acquire silver and gold in unrighteousness ..."