The triune God of justice has a mission in the world, which we are called to participate and partner in. The awesome nature of that mission and vision inspires and animates this volume, Now to God Who Is Able. An international array of Christian pastors, scholar activists, parachurch ministry leaders, and community organizers reflect critically on the theological, biblical, contextual, and practical dimensions of what it means to bear witness of the gospel orientated and anchored in God's justice. Using a trinitarian framework within the prophetic call to do justice, love mercy, and walk humbly with God, this book speaks to the modern challenges and opportunities of the pastoral vocation, ecclesiology, hermeneutics, homiletics, ecumenism, theological education, and missional theology. Each essay and this book honor the more than four decades of ministry of Mark Labberton, who retired as president of Fuller Theological Seminary in 2023.