And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter. ( Revelation 8:10-11 )
Water is more than H2O.
Water is more than essential for life.
Water is the physical manifestation of cause and effect:
You reap what you sow; What goes around comes around; Karma.
Consequences can be bitter as wormwood.
Principia Mattymatica 