Gall as an effect is bitter consequences that we have to endure. The cause may take the form of immorality, idolatry or any other sin. The consequences are widespread and affect whole communities.
Gall as an Effect
Mercury
Mercury may the planet killing meteorite Wormwood. Mercury/Wormwood will impact Earth during the tribulation, setting off a chain of events which will lead to another major upheaval. This is in the daily devotional for November.
Wormwood
Gall is an example of something which can be used to express either cause or effect. Bible passages that refer to the water of gall sometimes connect the concept to something called wormwood.
January 13th
Water is the physical medium in which cause and effect are linked. Water is the essence of free will. God gave us free will and we used it. We're now living through the consequences.
The Star Called Wormwood
It needs to be noted that it's said three times in Revelation chapter 8 that material falls to the Earth. In reality there are two concurrent events, each described from both an earthly and a heavenly perspective.
November 6th
The third trumpet is the third plague which involves large quantities of material falling out of the sky. The stars fall from heaven as the continents are moved into a contiguous landmass.