The record of Rev. Moon\u2019s usage of the term Heavenly Parent to refer to God is well attested in his words and in his theology. In particular, Wolli Wonbon, which he wrote at the very beginning of his ministry, provides a comprehensive explanation of his core theology of God as both Heavenly Father and Heavenly Mother. This episode is also available as a blog post: http://appliedunificationism.com/2016/02/22/god-as-heavenly-parent-in-rev-moons-early-teachings/