Some indeed preach Christ even of envy and strife; and some also of good will:
'Some indeed are preaching Christ even for х dia (G1223): on account of: to gratify] envy; i:e., to carry out the envy they felt toward Paul at the success of the Gospel in the capital of the world, owing to his stedfastness in imprisonment: they wished to transfer the credit to themselves. Probably Judaizing teachers (Romans 14:1-23; 1 Corinthians 3:10-15; 1 Corinthians 9:1, etc.; 2 Corinthians 11:1-4).
Some also of (for) good will - answering to "the brethren" (Philippians 1:14); some being well disposed to him.