Quoted from the article you link:
What we have seen is that in God’s creation, there exists a “Divine Proportion” that is exhibited in a multitude of shapes, numbers, and patterns whose relationship can only be the result of the omnipotent, good, and all-wise God of Scripture. This Golden Ratio—existing in the smallest to the largest parts, in living and also in non-living things—reveals the awesome “hidden hand” of God and His interest in beauty, function, and order.
Also, the article quotes other material saying this:
Some of the greatest mathematical minds of all ages, from Pythagoras and Euclid in ancient Greece, through the medieval Italian mathematician Leonardo of Pisa and the Renaissance astronomer Johannes Kepler, to present-day scientific figures such as Oxford physicist Roger Penrose, have spent endless hours over this simple ratio and its properties. … Biologists, artists, musicians, historians, architects, psychologists, and even mystics have pondered and debated the basis of its ubiquity and appeal. In fact, it is probably fair to say that the Golden Ratio has inspired thinkers of all disciplines like no other number in the history of mathematics.
God's design is evident in His creation. It's a testimony to the FACT that He did create the universe!
However, it's a big mistake to make a religion of the Golden Ratio, being called a "Divine Proportion." Pythagoras, mentioned in the quote above, was a student of the Egyptian Mystery Schools. These schools represent occult pagan beliefs, not Christian truths. Evidently, even Kepler, who was considered a mystic by some, dabbled in the occult through astrology.
Other speakers examined Kepler’s theory of music, his philosophy of nature, his notion of experiment, as well as his astrology work. (Although Kepler rejected “the specific prediction of future things,” poverty sometimes forced him to earn a living drawing natal charts.)
Source: Searching Heaven and Earth for the Real Johannes Kepler
It's dangerous to mix Christianity with paganism, which is tantamount to confusing the power of the Holy Spirit, who is God, with magic, which is NOT from God. In fact, various scriptures throughout the Bible (OT and NT) condemn witchcraft and sorcery.
Galatians 5:19-21-- 19 Now the works of the flesh are evident: sexual immorality, impurity, sensuality, 20 idolatry, sorcery, enmity, strife, jealousy, fits of anger, rivalries, dissensions, divisions, 21 envy,4 drunkenness, orgies, and things like these. I warn you, as I warned you before, that those who do5 such things will not inherit the kingdom of God.
