Armstrongism presents a unique understanding of God's nature: God is a family rather than an individual. The divine family currently consists of the Father and Jesus Christ, with the Holy Spirit as God's shared power. However, the plan of salvation centers on believers being called to become members of the God Family through resurrection, thus expanding the family beyond the current two Beings.

This 'God Family' theology distinguishes Armstrongism from both traditional Trinitarian Christianity and Unitarian monotheism. It emphasizes that humans are created in God's image to eventually become divine family members, sharing God's nature, immortality, and power. This framework gives unique meaning to the Incarnation and to salvation: humans are called not merely to forgiveness but to godhood.