The nailing of Luther’s ninety-five these to the Church door in Wittenberg on October 31st, 1517, was the event that more than any other even marks the inception of the movement called the Protestant Reformation. It is well that we should celebrate that event (cf. Psalm 77:11). Celebration can be devoid of any significant appreciation of what was involved in that movement. We can become partisan idolaters, for celebration may be little more than an expression of loyalty to certain traditions. If we are to honor God, our remembrance will proceed from profound gratitude to him for the light that shone in the midst of darkness, and for the emancipation that occurred when the Reformers were cut loose from shackles of superstition and idolatry.
—Professor John Murray
[Collected Writings of John Murray: The Claims of Truth, Vol. 1, “The Crux of the Reformation,” Banner of Truth, p. 298.]