Nicene and Post-Nicene Fathers, Ser. II, Vol. III:
Life and Works of Rufinus with Jerome's Apology Against Rufinus.: The way of peace is through the wisdom taught in the Book of Proverbs, and through unity in the faith.

44. In the end of your letter you say: “I hope that you love peace.” To this I will answer in a few words: If you desire peace, lay down your arms. I can be at peace with one who shews kindness; I do not fear one who threatens me. Let us be at one in faith, and peace will follow immediately.