“From all corners of the world comes a challenge to God’s Word [and] against the Gospel of Christ. But we must…fulfill our duty…devoted to the defense of the Gospel.…
Indeed, truth cannot be stated clearly at all without being set over against error. Thus a large part of the New Testament is polemic; the enunciation of evangelical truth was occasioned by the errors which had arisen in the churches. So it will always be….
At the present time, when the opponents of the Gospel are almost in control of our churches, the slightest avoidance of the defense of the Gospel is just sheer unfaithfulness to the Lord.
There have been previous great crises in the church. [One] in the second century, when [Christianity] was threatened by the Gnostics. Another came in the Middle Ages when the Gospel of God’s grace seemed forgotten. In such times of crisis, God has always saved the church. But He has always saved it not by theological pacifists, but by sturdy contenders for the truth.” [Emphasis added]
– J. Gresham Machen
Jude 1:3-4 Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints. For there are certain men crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ.
1 Timothy 1:18 This charge I commit unto thee, son Timothy, according to the prophecies which went before on thee, that thou by them mightest war a good warfare;
1 Timothy 6:12 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.
Titus 1:9-16 Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers. For there are many unruly and vain talkers and deceivers, specially they of the circumcision: Whose mouths must be stopped, who subvert whole houses, teaching things which they ought not, for filthy lucre’s sake. One of themselves, even a prophet of their own, said, The Cretians are alway liars, evil beasts, slow bellies. This witness is true. Wherefore rebuke them sharply, that they may be sound in the faith; Not giving heed to Jewish fables, and commandments of men, that turn from the truth. Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled. They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.
Proverbs 27:5-6 Open rebuke is better than secret love. Faithful are the wounds of a friend; but the kisses of an enemy are deceitful.