Changes

In the Eastern Liturgies, it is commonly taken for granted that this was a Theophany (a visible manifestation of the invisible God). For, e.g., "God in Three Persons appeared to Abraham at the oak of Mambre, and through mercy he was given as reward for his hospitality Isaac. That God we now glorify him as God of our Fathers."<ref>Octoechos, Sunday, Tone 3, Midnight Office, Ode 7.</ref><ref>https://www.academia.edu/13190369/The_Early_Christian_Reception_of_Genesis_18_From_Theophany_to_Trinitarian_Symbolism</ref>

In the Eastern Liturgies, it is commonly taken for granted that this was a Theophany (a visible manifestation of the invisible God). For, e.g., "God in Three Persons appeared to Abraham at the oak of Mambre, and through mercy he was given as reward for his hospitality Isaac. That God we now glorify him as God of our Fathers."<ref>Octoechos, Sunday, Tone 3, Midnight Office, Ode 7.</ref><ref>https://www.academia.edu/13190369/The_Early_Christian_Reception_of_Genesis_18_From_Theophany_to_Trinitarian_Symbolism</ref>

St. Augustine comments: "But since three men appeared, and no one of them is said to be greater than the rest either in form, or age, or power, why should we not here understand, as visibly intimated by the visible creature, the equality of the Trinity, and one and the same substance in three persons?" ZZ<ref>http://www.newadvent.org/fathers/130102.htm</ref>

St. Augustine comments: "But since three men appeared, and no one of them is said to be greater than the rest either in form, or age, or power, why should we not here understand, as visibly intimated by the visible creature, the equality of the Trinity, and one and the same substance in three persons?" <ref>http://www.newadvent.org/fathers/130102.htm</ref>

==Illustrations and analogies==

==Illustrations and analogies==