1) Spirit derives from the Latin �Spiro�, �I Breathe�
2) Spirit is attributed the the first Key of Tarot: Key 0: The Fool.
3) �Fool� comes from the Latin �Follis�, a �Wind-bag�
4) Wind-bag is synonymous with �Bellows�
5) A �Bellows� is a device which uses air to stir up a fire. Air is the element attributed to The Fool (Aleph, letter of Key 0). A fire �breathes� oxygen, when deprived of it, the fire is �smothered�. Air is �uncreated fire�, and is required for Fire to manifest.
6) Fire is Heat, and humans are warm-blooded, which implies internal combustion.
7) The Fiery Holy Spirit (Shin, seen on the Fools robes in lowermost wheel), �The Lord God is a consuming fire�.
8) We inhale Oxygen and exhale Carbon. Carbon is the product of combustion.
9) Carbon Dioxide will deprive the fire of Oxygen. Hence smoking=bad. To smoke is to prevent the manifestation of Fire (Imbas) and Life.