Rudolf Steiner:
"The first experience [in Devachan] is the perception of one's own body, and this experience is the starting point for all other experiences. The human being feels strongly that he has emancipated himself from his bodily involucres, for the most blissful of moments is the one in which he discards the last body, the astral corpse. Even as a plant wedged in the fissure of a rock would experience it as bliss to be freed, so this feeling of blissfulness becomes a fundamental sensation of the human being. It permeates him and transfigures the other feelings which were once experienced in an earthly manner, for instance, feelings of friendship, which may perhaps undergo certain transformations here on Earth, but which are deepened and purified in the spiritual realm.
Also a mother's love for her child undergoes such a purification, and vice versa. The originally animal feeling of belonging to one another, which even here upon the Earth took on a moral character, unfolds a still higher moral power in Devachan. Every tie on Earth becomes deepened in the spiritual realm, and all connections interpenetrate.
Through love man works his way up from the narrowness of egotism to the encompassing experience of cosmic life. There nothing is divided or severed; each one works for the others, for even in the spiritual world activity and work constitute the element which carries, furthers, and unites the souls. But Love is the inexhaustible source of all life."
At-one-ment
Washed in the Blood of the Lamb are We
Awash in a Sonburst Sea
You—Love—and I—Love—and Love Divine:
We are the Trinity
You—Love—and I—We are One-Two-Three
Twining Eternally
Two—Yes—and One—Yes—and also Three:
One Dual Trinity
Radiant Calvary
Ultimate Mystery