The Savior is the source of true peace,” said Elder Quentin L. Cook of the Quorum of the Twelve Apostles. “Even with the trials of life, because of the Savior’s Atonement and His grace, righteous living will be rewarded with personal peace.”1 Understanding that Jesus Christ is the Prince of Peace can help us find inner peace and increase our faith in Him
This quote came from here: https://www.lds.org/ensign/2014/12/the-divine-mission-of-jesus-christ-prince-of-peace?lang=eng