Welcome to Parallax. A definition: parallax is the apparent change in the position of an object resulting from the change in the direction or position from which it is viewed. This will ring true for those who read and study theology and philosophy and who try to discuss or apply them.
Slavoj Zizek has an interesting application of architectural parallax in his book ‘Living in the End Times’ (versobooks.com) that is well worth reading. Zizek refers to Hegel in order to more closely define parallax: “It is rather that, as Hegel would have put it, subject and object are inherently “mediated,” so that an “epistemological” shift in the subject’s point of view always reflects an “ontological” shift in the object itself.”
In essence there is no concrete ground we can easily appeal to because the view and therefore our understanding is always shifting.