From Adventures in New Testament Greek: Nous

Dormant in its roaring cave,
the heart’s intellective aptitude grows dim,
unless you find a way to wake it. So,
let’s try something, even now. Even as
you tend these lines, attend for a moment
to your breath as you draw it in: regard
the breath’s cool descent, a stream from mouth
to throat to the furnace of the heart.
Observe that queer, cool confluence of breath
and blood, and do your thinking there.
--Scott Cairns