Father; God the Father
The First Person of the Blessed Trinity.
He is truly Father as He begets a co-eternal and co-equal Son, to whom He imparts the plenitude of His Nature and in Whom He contemplates His own perfect image.
By nature God is Our Creator and Lord, and we are His creatures and subjects.
By sin we are His enemies and deserve His chastisements.
By grace, however, He lovingly pardons us, adopts us as sons, and destines us to share in the life and beatitude of His only-begotten Son, Jesus Christ.
Thus by Divine adoption God is Our Father and we are His children.
This adoption is effected through sanctifying grace, a Divine quality or supernatural habit infused into the soul by God, which blossoms into the vision of glory in life eternal.
New Catholic Dictionary