'The Breath of Life'/ The Black Breath
 

I've been thinking about something lately, about the act of 'breathing' in Tolkien. May sound a bit wierd, but I think 'breath' has an importance in the Lord of the Rings.

In the Judeo-Christian belief, the 'breath of life' is important when it comes to actually 'living.'
Also, the Egyptians talk about the 'breath of life.' But, slightly different the Egyptians only believe that this 'breath' is needed in the afterlife. The symbol of the Ankh being held to someone's lips is an offering of the 'breath of life' and is needed after death.

And in several Meso-american cultures, their word for life/spirit can translate to 'breath.' The Mayans use the word'ik' to mean wind, breath, or life, and for the Zapotecs it was 'pee.'

The 'breath of life' appears in several modern and ancient cultures, and I'm sure there's more that I have not been able to think of. But, let's get to the importance in LOTR.
And Aragorn:
Aragorn's breath was to cure those who were stricken by the Nazgul's 'black breath'. Which gets me thinking is Aragorn and Galadriels physical action of 'breathing' their 'breath of life?' And their 'breath of life' is able to heal or actually cause 'life?' And what about the Nazgul's 'black breath...' is it a corrupted 'breath of life?'
The 'breath of life' can heal, and in the Mirror of Galadriel it 'lives,' but the Black breath is corrupted, and sorry for the corny...'Breath of death.'

Sounds like the shadow or 'wraith' that left Saruman's body after he died.

The breath of life concept makes me think of the Sandman (surprise, surprise), and maybe only a few people will get this, but I think it's worth mentioning. In The Wake, the Endless fashion a servant out of mud, and all leave their mark on it, but only when Death breathes life into it can it actually function.

What are words but breath ennunciated, given form and meaning by tongue and lips and teeth? The breath of life is presence, fully present and not some stamped image on a page or fleeting electrical impulse on a screen.

The Nazgul, of course, are never fully present, hence their corrupted breath.

Eru sent into Ea the flame imperishable, the Secret Fire; the divine Life force of the world.
Metaphorically: Fire needs oxygen... oxygen implies breath. Perhaps to Tolkien breath is the sustanance of the flame imperishable in each and every one of us