Scripture makes this plain in the great commandment: “You shall love the Lord your God with all your heart, and your neighbor as yourself.” The moment a person begins to love, holiness begins. But holiness is complete only when love has fully overcome selfishness — when a person loves with the whole heart.
Faith, without question, comes before love. Whether we look at this biblically or psychologically, faith is the foundation and the necessary starting point. But even so, Scripture gives love the highest honor, calling it “the fulfillment of the law.” So the most important question we can ask — whether we truly belong to God and are genuinely holy — ultimately comes down to this: Are we perfected in love?