This saying in John 3:14-18 is taken from Numbers 21:5-9. Israel (God's people) spak against God, and against Moses, and because of the disobedience of Israel, God sent poison snakes from the sky that would bite, and kill them. God instructed Moses to make a brass snake upon a pole, that when the people of Israel got bit, if they would look upon the poll they would be healed.
The brass serpent wrapped around a pole, is the emblem use by doctors and health care people to refer to healing.
The emblem used by the doctors and health care people has absolutely nothing to do with Christ, John 3:14-18, or Numbers 21:5-9.
https://www.ncbi.nlm.nih.gov/pmc/ar...he caduceus is the,of Asclepius in their logo.
The caduceus or the staff of Hermes, depicted as a stick entwined by two snakes and surmounted wings is the symbol of modern medicine in India and elsewhere. Most major hospitals, medical colleges, clinics, professional bodies, prescriptions and medical journals support this symbol either as an emblem or as part of their logo. The car windshields of many doctors feature this symbol prominently as a badge of prestige and honor. But unfortunately, the very emblem we flaunt as an insignia of our profession is a false symbol and has nothing or very little to do with the noble art of healing. The true and authentic symbol of Medicine is not the Caduceus but the Rod of Asclepius [
1]. The Rod of Asclepius is a single serpent entwined rod wielded by the Greek God of healing and Medicine, Asclepius [
2]. In Greek mythology Asclepius is the son of Apollo- the god of light, the Sun, truth and also a god of healing. Asclepius’s daughters are Hygieia, the goddess of hygiene and cleanliness and Panacea the goddesses of remedies. The Hippocratic Oath which all physicians have taken for centuries is dedicated to the same four deities, namely Apollo, Asclepius, Hygieia and Panacea. In contrast Hermes, also a Greek God and his counterpart in Roman mythology, Mercury are patron Gods of commerce, trade, merchants and a protector of tricksters and thieves. More importantly Hermes is a God of transitions and boundaries, and moves freely between the worlds of the mortal and divine and guides departed souls to the underworld. In 1902 a Captain in the US Army medical corps mistook the caduceus for the Rod of Asclepius and proposed the adoption of the caduceus as the corps official symbol. Several years later, a librarian in the Surgeon General’s office noticed the erroneous assumption and alerted his superiors, but since the symbol had been by then in use for several years it was allowed to remain. Unfortunately, others allied to medical services in the U.S. and soon the world adopted the same symbol [
3–
6]. The staff of Hermes embodies cunning machinations and death, hardly the connotations an emblem of healing should evoke.