The highest court in our land decided—ultimately by the vote of one man, Justice Kennedy—that our great Constitution gives a man the right to marry another man and a woman, a woman. This was not about so-called “marriage equality,” but a dramatic marriage redefinition, changing this essential institution into a gender-less institution where husband and wife do not require one another, where children do not need their mother and father, and where there is nothing uniquely important about male or female for the family. They become merely preferential or sentimental.

For the Church, we must discern that this is a vicious attack by the evil one on God’s very image in the world: “Let us create man in our image, in our likeness…in the image of God He created him, male and female he created them.” (Genesis 1:26-27)

It is an attack against what God tells us is the nature of His Son’s relationship with the Church, that of a husband and wife. God’s Word starts with a marriage in its first pages and ends with a very different kind of—a more glorious—marriage in the last pages. And right in the middle God has placed a beautiful book telling of the wonderful love between a husband and wife.

What the Court did on June 26 did not take God by surprise, even if it makes Him sad. It does not change any of the above beautiful truths of Christianity. But it does call each of us to know that we cannot allow the Court’s ruling to be the last word on what marriage is. The message of Christianity, the gospel itself actually, is a story of marriage. Wasn’t the cross a humbling of the Groom for His Bride, an invitation to each of us to attend the Great Wedding Feast of the Lamb as His beloved? He paid the Bride price and calls us to Himself to be His alone.

This moment in history asks whether we will continue to proclaim this amazing story, this great hope. Will we continue to demonstrate the importance of marriage as an essential social institution, one created by God? If we won’t, then who will? There is no one but us, whom God has put on the stage of human and church history at this moment in this nation.

Glenn T. Stanton is the Director of Family Formation Studies at Focus on the Family and the author of Loving My (LGBT) Neighbor: Being Friends in Grace and Truth (Moody, 2014)