"Expanding Christianity: Breaking Out of the Box" explores the idea that Christianity is a melting pot of nuance, and that we need to be honest and own our individuality. McKay encourages readers to embrace open-mindedness as we explore the fundamental questions we all have as Christians. These discussions and questions include topics such as Heaven and Hell, Faith, God, Inerrancy, Christian identity, our role in the universe, how we are connected to God and to the Earth, etc.
Through mindfulness and deep introspection, McKay highlights the connections we all have with a higher power and with Heaven and Hell, as present realities rather than solely consequences afterlife. This includes some insight into how Buddhists and Hindus think, and how we can use and understand their way of life for our benefit as Christians, and to better love those different from us. This thought-provoking and enlightening read invites readers to challenge themselves and their society to embrace the diversity of life and the uniqueness of our perspectives.