That is why it is “a good fight of faith,” because it is a “good” fight!

For we wrestle not against flesh and blood, but against (1) principalities, against (2) powers, against the (3) rulers of the darkness of this world, against spiritual (4) wickedness in high places.

Fight the good fight of faith, lay hold on eternal life, whereunto thou art also called, and hast professed a good profession before many witnesses.

14 We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.

15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.

16 Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren. (1 John 3:14-16 KJV)