her conclusions or confirmations. But real affection
for truth is perceived only as a pressure of will from something
pleasurable which is interiorly in meditation as its life, and is little
noticed. From all this it can now be seen that these three, affection for
truth, perception of truth, and thought, follow in order from love, and
that they have existence only in the understanding. For when love enters
into the understanding, which it does when their conjunction is
accomplished, it first brings forth affection for truth, then affection
for understanding that which it knows, and lastly, affection for seeing
in the bodily thought that which it understands; for thought is nothing
but internal sight. It is true that thought is the first to be manifest,
because it is of the natural mind; but thought from perception of truth
which is from affection for truth is the last to be manifest; this thought
is the thought of wisdom, but the other is thought from the memory through
the sight of the natural mind. All operations of love or the will not
within the understanding have relation not to affections for truth, but
to affections for good.

405. That these three from the will's love follow in order in the
understanding can, indeed, be comprehended by the rational man but yet
cannot be clearly seen and thus so proved as to command belief. But as
love that is of the will acts as one with the heart by correspondence,
and wisdom that is of the understanding acts as one with the lungs (as
has been shown above) therefore what has been said (in n. 404) about
affection for truth, perception of truth, and thought, can nowhere be
more clearly seen and proved than in the lungs and the mechanism thereof.
These, therefore, shall be briefly described. After birth, the heart
discharges the blood from its right ventricle into the lungs; and after
passing through these it is emptied into the left ventricle: thus the
heart opens the lungs. This it does through the pulmonary arteries and
veins. The lungs have bronchial tubes which ramify, and at length end in
air-cells, into which the lungs admit the air, and thus respire. Around
the bronchial tubes and their ramifications there are also arteries and
veins called the bronchial, arising from the vena azygos or vena cava,
and from the aorta. These arteries and veins are distinct from the
pulmonary arteries and veins. From this it is evident that the blood
flows into the lungs by two ways, and flows