1) Pride, envy, and backbiting are major vices discussed in the Quran. Pride can arise from knowledge, wealth, power or deeds and causes one to feel superior over others.
2) Envy is disliking what others possess and hoping they lose it. It was the cause of the first murder between Cain and Abel. Envy destroys faith, goodness, peace and prevents beneficial deeds.
3) Backbiting involves saying harmful things about someone absent in a way they would dislike. While sometimes permitted to correct injustice, backbiting generally damages community and must be avoided through self-accountability and speaking good or remaining silent.