Unity is one of the four basic characteristics of the Catholic Church. It is also the primary concern of her founder (John 17). The uniformity in her liturgy also depicts this necessary character of the Church. She has equally upheld this in her magisterial teachings. In practice, there appears to be some conspicuous cracks here and there. Apparent discriminations on the ground of sex, race, education and even religious affiliation are undeniable. The Holy Father, Pope Francis has so rightly and timely called for a synod on synodality. He calls on the Church to an all inclusiveness as defined in her character of unity. In Eph 4,1-6 the author posits this as the vocation of all Christians. This paper views Paul's clarion call with an exegetical lens. It sees it as the Church's imperative if she would succeed in her evangelical mission. The paper adopts exegetical method and then evaluates it with a hermeneutical application, calling all to a unity in diversity as a way to realization of her divinely assigned mission of evangelization.