John 14:6 "Jesus said to him, "I am the way, and the truth, and the life. No one comes to the Father except through me."
Acts 4:12 "And there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved."
The Bible says there's just "one way" to God. But today, postmodernists claim that "no one way is the right way," and any way is okay. To them there is no absolute truth. In their inclusive view, every man's opinion is as good as the next.
In contrast, the relevance of the gospel has always been its absolute exclusivity—that Christ alone atoned for sin and, therefore, faith in Christ alone can reconcile us to God. Even though that exclusive message has always been a stumbling block to some and foolishness to others, we are commanded to believe it and preach it anyway. Nonetheless, Christians today are becoming increasingly uneasy with the one-way message, causing the church to become weak and ineffective.
We must resist the tendency to be absorbed into the fads and fashions of worldly thought. Our task as ambassadors of God is to present the untarnished gospel—an inherently exclusive message—that is the power of God unto salvation because it's the only way to God. —Dr. John MacArthur
Taken from the book Why One Way? by Dr. John MacArthur, W Publishing Group 2002.