It takes a high level of commitment to build understanding in a relationship. It can only take a couple that’s committed to each other to have understanding, and that understanding would in turn lead to peace in that relationship. Commitment is essential if you want to have a peaceful relationship; if it isn’t there then the relationship would definitely not sail smoothly.
A peaceful relationship also exists when both partners are happy. If one partner is unhappy then it could tamper with the peace in that union. Partners have to be happy to be in a relationship, they have to be happy about having the other person in their lives — without these, peace would just be a forlorn theory.