"Of the fifty ways of Heaven, one escapes the net" means that the Heavenly Dao is imperfect and human affairs are unpredictable.
This saying comes from the Book of Changes and conveys that the laws governing the universe are not completely deterministic.
The fifty ways of Heaven: The Heavenly Dao usually refers to the overarching laws that govern all things in the universe. The number fifty is not meant to specify an exact quantity. Rather, it emphasizes the complexity and variability of the Heavenly Dao, which can never be fully understood. It represents the sum of the natural and cosmic laws of Heaven and Earth, a state that is nearly perfect but still has flaws.
Human beings are part of the universe and possess the ability to act on their own initiative. That one escapes the net means that, when faced with the Heavenly Dao, people can always find a sliver of hope, a chance for change. This is because human thought and action are unpredictable, and can influence or even alter the course of the Heavenly Dao.
"Of the fifty ways of Heaven, one escapes the net" emphasizes the complexity of the laws of the universe and the power of human agency. It reminds people that when facing fate, they should both revere the Heavenly Dao and dare to take their destiny into their own hands.
Li Di Yi was an utterly ordinary person, yet he embarked on a magnificent journey in pursuit of the Dao.