What's the difference between six hexagrams and four pillars?

Four pillars are used to calculate the fortune of a person's life, and six pillars are very useful in calculating an emergency. Four pillars and six hexagons are multidimensional integration.

Six hexagrams is a massive method, which is easy to learn and difficult to master. Four pillars and six hexagons, geomantic omen.

The four pillars are complex, so it is best to learn six hexagons first.