“It is not true at all, then, that modern liberalism is based upon the authority of Jesus. It is obliged to reject a vast deal that is absolutely essential in Jesus’ example and teaching – notably His consciousness of being the heavenly Messiah. The real authority, for liberalism, can only be ‘the Christian consciousness’ or ‘Christian experience.’ … Such an authority is obviously no authority at all; for individual experience is endlessly diverse, and when once truth is regarded as only that which works at any particular time, it ceases to be truth.
The Christian man, on the other hand, finds in the Bible the very Word of God. Let it not be said that dependence upon a book is a dead or artificial thing. The Reformation of the sixteenth century was founded upon the authority of the Bible, yet it set the world aflame. Dependence upon a word of man would be slavish, but dependence upon God’s word is life. Dark and gloomy would be the world, if we were left to our own devices, and had no blessed Word of God. The Bible, to the Christian is not a burdensome law, but the very Magna Carta of Christian Liberty.
It is no wonder, then, that liberalism is totally different from Christianity, for the foundation is different. Christianity is founded upon the Bible. It bases upon the Bible both its thinking and its life. Liberalism on the other hand is founded upon the shifting emotions of sinful men.”
–J. Gresham Machen, Christianity and Liberalism (1923), 66-67.