But actually time isn't a straight line. It doesn't ave a shape. In all senses of the term, it doesn't have any form. But since we can't picture something without form in our minds, for the sake of convenience we understand it as a straight line. At this point, humans are the only ones who can make that sort of conceptual substitution.
The mysteries of the faith are not to [be] explained rashly to anyone. Usually in fact, they cannot be understood by everyone but only by those who are qualified to understand them with informed intelligence. The depth of the divine Scriptures is such that not only the illiterate and uninitiated have difficulty understanding them, but also the educated and the gifted.