A few quotes I found in Sacred Marriage...
The person who understands the evil in his own hear is the only person who is useful, fruitful, and solid in his beliefs and obedience. Others only delude themselves and thus upset families, churches, and all other relationships. In their self-pride and judgment of others, they show great inconsistency.
What is the reason that some believers are so much brighter and holier that others? I believe the difference, in 19 cases out of 20, arises from different habits about private prayer. I believe that those who are not eminently holy pray little, and those who are eminently holy pray much.
Dan Allender and Tremper Longman III:
Marriage requires a radical commitment to love our spouses as they are, while longing for them to become what they are not yet. Every marriage moves either toward enhancing one another's glory or toward degrading each other.