We may not think envy and jealousy are a bit deal, but the Bible refers to them as "earthly, unspiritual, demonic" (James 3:15). And scripture is filled with cautionary tales of the danger of envy (Cain & Abel; Rachel & Leah; Jacob & Esau; Joseph & his brothers; Saul & David). Proverbs teaches that envy rots to the bone (Prov. 14:3). We see in 2 Cor. 10:12 that envy begins with comparison.
Jam. 3:14-16; Prov. 14:30; 2 Cor. 10:12; Rom. 12:15