You appear to be referring to an introductory use of the symbol of the four holy creatures from a few texts of the Piscean era. Those meanings (the four creatures as equating zodiac signs) are similar to kindergarten use of "a for apple, b for ball." On a certain level, that may be, but there is far more to it. The four holy creatures are symbols that bear many layers and levels of meaning, which, to the intellect, can even appear contradictory or inconsistent. Furthermore, the intellect wants to reduce the symbols to concrete, limited forms, and forgets that these symbols are just illusions meant to point towards something in reality. That is, we take the symbol as real, and do not see what the symbol is pointing towards. Here we aim to study with not just the intellect, but with intuition, which cuts through to meanings that the intellect cannot perceive.

In the lecture you referred to, one level of meaning of the four holy creatures is discussed: as related to the four bodies of sin on the Tree of Life. These do not equate to the zodiac signs.