Albert Mohler quotes from J. Gresham Machen and a modern-day counterpart, Howard P. Kainz, on the rivalry between Christianity and Secularism:

Kainz concedes that some will resist his designation of secularism as a religion. “Religion in the most common and usual sense connotes dedication to a supreme being or beings,” he acknowledges. Nevertheless, “especially in the last few centuries, ‘religion’ has taken on the additional connotations of dedication to abstract principles or ideals rather than a personal being,” he insists. Kainz dates the rise of this secular religion to the French Enlightenment and its idolatrous worship of Reason…

Similarly, Kainz argues that modern secular liberalism includes its own dogmas. Among these are the beliefs “that mankind must overcome religious superstition by means of Reason; that empirical science can and will eventually answer all the questions about the world and human values that were formerly referred to traditional religion or theology; and that the human race, by constantly invalidating and disregarding hampering traditions, can and will achieve perfectibility.”

Read more at Albert Mohler’s Blog: Two Rival Religions?.