Ezekiel 40:16

And oblique windows in the chambers. In slanted windows, the part through which light enters is narrow, but the interior part which receives the light is wide, because the minds of those who contemplate, although they may see something slight of the true light, are nevertheless expanded within themselves with great amplitude. And indeed these minds can scarcely grasp even a few of the things they behold. For truly what those contemplating see of eternity is exceedingly small, yet from this small amount the bosom of their minds is enlarged into an increase of fervor and love; and hence they become spacious within themselves, from whence they admit the light of truth to themselves as if through narrow openings. Because this greatness of contemplation can be granted only to those who love, slanted windows are said to be in the chambers, or in those things which are said to be near the chambers, no longer on the outside but on the inside.

And in their fronts which were within the gate on every side round about. For there were windows in the chambers, and there were also windows in their fronts, which had been constructed within the gate on every side all around, because he who has a heart within also receives the light of contemplation. For those who still think immoderately about external things do not know what the openings of contemplation concerning eternal light may be. For that infusion of incorporeal light is not grasped together with images of corporeal things, because while only visible things are thought about, invisible light is not admitted to the mind. But whoever now attends to the light of contemplation must take great care to always guard the mind in humility, never to exalt himself because of the grace with which he is filled, and to consider what the oblique windows that mark the minds of contemplatives are like. For through oblique windows light enters, and a thief does not enter, because those who are true watchmen always keep their understanding pressed down in humility, and the understanding of contemplation enters their minds, but the boasting of pride does not enter. And so the windows are both open and fortified, because the grace with which they are filled is open in their minds, and yet they do not permit the adversary to enter through pride. It should be noted that within the gate, windows slanting inward are mentioned on every side throughout the circuit. For the grace of contemplation is not given only to the highest and denied to the lowly, but often the highest receive it, often the lowly, more frequently those who have withdrawn from the world, and sometimes even the married. If therefore there is no office among the faithful from which the grace of contemplation can be excluded, whoever has a heart within can also be illuminated by the light of contemplation, because within the gate windows slanting inward are constructed on every side throughout the circuit, so that no one may boast of this grace as though it were something singular to himself. Let no one think he possesses the gift of true light as his own private possession, because in that which he thinks he has as something special, often another is richer—one whom he did not think possessed any good within himself.