This volume presents a series of biblical-theological and exegetical studies on the attribute of God's immutability by engaging key passages and corpora from the New Testament. Each contribution examines how God's unchanging nature is articulated within its specific literary, historical, and theological context, demonstrating how this attribute emerges organically within the broader biblical narrative. While the New Testament consistently affirms God's constancy, it also portrays him as actively and dynamically involved in the life of his people--an apparent tension that has long invited theological reflection. The studies in this collection show that divine immutability is not to be understood as static immobility, but rather as the faithful consistency of God's character, purposes, and covenant commitments throughout history. By tracing this theme across diverse genres--including parables, exhortations, christological affirmations, and doctrinal passages--the volume highlights immutability as both a foundational theological concept and a source of pastoral assurance for the church in every age.