Psalm 119:105 (English Standard Version)
Your word is a lamp to my feet
and a light to my path.
"Light may seem at times to be an impertinent intruder, but it is always beneficial in the end. The type of religion which rejoices in the pious sound of traditional phrases, regardless of their meanings, or shrinks from "controversial" matters, will never stand amid the shocks of life. In the sphere of religion, as in other spheres, the things about which men are agreed are apt to be the things that are least worth holding; the really important things are the things about which men will fight."
J. Gresham Machen, From the introduction to 'Christianity and Liberalism.'