401, 3. Unless it is married to wisdom or discernment, love or volition cannot accomplish anything through its human form. This too we can see from the way the heart corresponds to our volition. The human fetus is alive as to its heart but not as to its lungs. Blood is not yet flowing from the heart into the lungs and enabling them to breathe, but is flowing through an opening into the left ventricle of the heart. As a result, the fetus cannot yet move any part of its body, but rests bound; and it cannot sense anything, with its sensory organs closed.
It is the same with the love or volition. [The fetus] is alive because of it, but in darkness. That is, it lacks sensation and action. As soon as the lungs are opened, though, which happens after birth, it begins to sense and to act and at the same time to intend and to think.
We can tell, then, that unless it is married to wisdom or discernment, love or volition cannot accomplish anything through its human form.