This is a principle I took from the student manual "Achieving A Celestial Marriage"

"Christ's atonement provides the power by which men and women may obtain and preserve celestial marriages if they seek the benefits of the Atonement through obedience to the gospel."

A couple were having marriage problems and talked with their bishop. After some discussion he asked a final question, "If you believe that Christ is an actual person who died in order that your sins could be taken away; if you believe that the power he has is greater than the power of Satan; if you believe that He still lives today and exercises that power in your behalf, why don't you turn to Him and to the power of His atonement, and then use that power to eliminate the problems that are plaguing your marriage?"

I know that the Savior lives and can heal, bless and protect marriages. I love Him.