Bitter jealousy (zhlon pikron). Zhlo occurs in N.T. in good sense ( John 2:17 ) and bad sense ( Acts 5:17 ). Pride of knowledge is evil ( 1 Corinthians 8:1 ) and leaves a bitter taste. See "root of bitterness" in Hebrews 12:14 (cf. Ephesians 4:31 ). This is a condition of the first class. Faction (eriqian). Late word, from eriqo (hireling, from eriqeuw to spin wool), a pushing forward for personal ends, partisanship, as in Philippians 1:16 . In your heart (en th kardiai umwn). The real fountain (phgh, verse James 3:11 ). Glory not (mh katakaucasqe). Present middle imperative of katakaucaomai, for which see James 2:13 . Wisdom is essential for the teacher. Boasting arrogance disproves the possession of wisdom. Lie not against the truth (pseudesqe kata th alhqeia). Present middle imperative of pseudomai, old verb, to play false, with mh carried over. Lying against the truth is futile. By your conduct do not belie the truth which you teach; a solemn and needed lesson. Cf. Romans 1:18, 2:18,20Romans 2:18 Romans 20 .