"For what if some did not believe? shall their unbelief make the faith of God without effect? God forbid: yea, let God be true, but every man a liar; as it is written. That thou mightest be justified in thy sayings, and mightest overcome when thou art judged." (Romans 3:3-4)
Many Christians are so intimidated by the arrogant unbelief of the supposed intellectuals of the world that they either reject or compromise or ignore the difficult teachings of Scripture. This is a grievous mistake, for all of God's "sayings" are "justified" and He will surely "overcome" all those who presume to "judge" Him and His Word.
The only reason to believe in evolution, for example, is the fact that most such intellectuals believe it. There is no real evidence, either in the Bible or in science, for evolution or any other form of unbelief, yet many professed believers in Christ seem to have "loved the praise of men more than the praise of God" (John 12:43). Therefore they assume that God does not really mean what He says in His Word, thereby making faith in His Word "without effect."
God's truth is not determined, however, by taking a vote, or by the opinions of skeptics, or by metaphysical speculation. It is determined by God Himself, and none other, "for the word of the Lord is right; and all his works are done in truth" (Psalm 33:4).
Therefore, as our text commands: "Let God be true, but every man a liar." The very criterion of truth is the Word of God. It is good to explain God's Word to those open to its truth, but never to explain it away, by some compromising accommodation to current scientism. "Thy word is true from the beginning: and every one of thy righteous judgments endureth for ever" (Psalm 119:160). The Lord Jesus confessed, unreservedly, "Thy word is truth" (John 17:17), and so should we. HMM