Book excerpt: This book starts by establishing that all believers in Christ are already, in fact, one with each other in Christ. This leaves us with the challenge, not of creating unity where it does not exist, but of living consistently with the oneness that already exists. The first section explains why living consistently with our oneness is important, including God’s commands and expectations, the benefits of living in oneness and the hazards of living contrary to the truth. Part two explains what oneness is and is not, including the concepts that oneness is a harmony of diverse believers each doing their own part, not unison, unanimity or strict conformity to the same mold. The third section deals with practical barriers to living in oneness—selfishness, misunderstandings, heresy, and incorrect understanding of the origin of the organizational divisions in the universal Church—and suggests how to overcome them.