The heart means love. A good heart means love to the Lord and to the neighbor, while a hard or stony heart means the love of self or the world -- riches and things. When the psalmist asks the Lord to search his heart, he wants the Lord to see what it is that he loves. And we are what we love. What we eat may form our earthly body, but it's only temporary, what we love forms our spiritual body, beautiful or ugly as we have chosen. It's interesting to note that the first multi-cellular motion of our embryo is the pulsating that starts in a twist of blood vessel that is to become our heart, and the last motion of our natural body is our heartbeat. It is there for all of our natural life. And of course there is a beating heart in our spiritual bodies when we come to put them on.

1974. After troubled sleep a very lovely sight presented itself round about the first watch. There were wreaths as of laurel, green and fresh, placed in a very beautiful order, and moving as though they were alive. They were formed and arranged in such a way that their beauty and unity, and the feeling of bliss flowing from these, defy description. They ran in a double series spaced a little distant from each other and extended quite a long way with ever varying beauty. This was plainly seen by spirits, even by evil ones. Then another sight followed, which was still more beautiful, holding heavenly happiness within it; yet it was only dimly visible. Young children were playing heavenly games which filled the mind with feelings beyond description.

[2] Subsequently I spoke to the spirits about those sights and they confessed that they had seen the first as clearly as I had done but not the second except so obscurely that they could not tell what it was. This gave rise to anger within them, and after that gradually to envy, when they were told that the angels and young children had seen it; and I was allowed to experience with my senses their feeling of envy so that nothing should escape me insofar as it contributed to what I had to learn about. Their envy was such that it not only caused them extreme annoyance but also agony and interior pain, and solely because they did not see the second sight as well as the first. They were consequently led through different kinds of envy until they experienced pain in the region of the heart.

[3] While they were passing through this state I talked to them about their envy. I said that they might have been contented with having seen the first vision, and that they could have seen the second as well if they had been good spirits. But this too merely roused their anger, which increased their envy to such an extent that after that they could not bear the faintest recollection of the experience without feeling pain. The states and the successive stages of their envy, together with the degrees of it, the increases in it, and the varied intermingled feelings of distress in mind and heart, are indescribable. In this way I was shown how much the wicked are tormented by envy alone when they see from afar the blessedness of the good, or indeed when they simply think about it.