My thanks to Justin Taylor for this:
What sustains the marital bond and affections over the long haul? Three men with a combined 116 years of marriage reflect on what they’ve learned from God’s Word and others along with their experience.
Don Carson, Tim Keller, and John Piper offer insight on falling in love again and again and the ground of covenant in which the flower of love grows. In marriage, man and woman change but their promise does not, sustained by the God who enacted his covenant between Christ and the church.
Keller’s marriage series can be purchased here.
Piper’s book is This Momentary Marriage: A Parable of Permanence.