6 Ways Christians Can Fight the 'Cultural Marxism' on College Campuses

4. Christianity provides a basis for rationality.

The goodness of Christianity does not stop at charity, however. Miller explained that "God serves as the basis even for rationality."

"In the Incarnation you have both the emphasis for compassion and you have the logos," the Ratio Christi president said, citing the ancient Greek word which the Gospel of John identified with Jesus Christ. Famously, in the opening of his Gospel, John wrote that "In the beginning was the word, and the word was with God, and the word was God." The word for "word" is logos, and it means idea, concept, speech. It is the basis for the English word "logic," and for scientific disciplines like "psychology."

The identification of Jesus Christ as logos has its roots in Genesis 1, where God created the world through speech. It also emphasizes a connection between the mind that created the universe and the minds of human beings, a connection that derives from the idea of man made in God's image. "Rationality itself is grounded in God, and what distinguishes human beings from other animals is having that rational capacity," Miller explained.

Christianity emphasizes the value of logic and reason by providing an explanation for the miracle of science: Somehow, the human mind is capable of understanding the order behind nature. If human beings and their rational capacity only developed by chance in evolution and natural selection, there is no reason to assume that their minds were wired for truth.

But if Christianity is true, people were made in the image of the very God whose words formed the universe. Their minds are made not merely for survival, but for a connection with ultimate reality.

5. Christianity and science.

This Christian view of rationality also helps believers navigate the complex realm of faith and science. As Miller argued, "from a Christian perspective, science is a very good thing."

The Ratio Christi president noted that "in the history of science most of the major subdisciplines were founded by Christians," such as Gregor Mendel (father of modern genetics), Robert Boyle (chemistry), Isaac Newton (physics), and Johannes Kepler (astronomy).

"It's not that science has been opposed to Christianity; It's the Christian theistic worldview that gave rise to science because we have a worldview that involves a Creator creating an intelligible creation with intelligent beings with rational capacity that have sense perceptions that can attach to the natural world," Miller said.

Many think that Christianity and science are incompatible, but "the problem is not Christianity and science, the problem is Christianity and scientism." Miller described scientism as "a philosophy of science that tends to assume a worldview of naturalism," a worldview that is incompatible with Christianity.

"Some of what passes as science is not even science — it's a certain philosophy of science," the Ratio Christi president explained.

"Whenever there is an alleged discrepancy between science and Christianity, it's really not a discrepancy about the facts themselves ... it's about the interpretation of the facts from a theologian and a scientist," Miller argued. He quoted Francis Bacon, who said that if God exists, "He has two books, his word and his world, scripture and nature. When those two are properly interpreted, there can be no contradiction."

Next Page: Tying it all together — How we unite Christianity and ideas.