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.

377. Verses 7-8. And when he had opened the fourth seal, I heard the voice of the fourth animal saying, Come and see. And I saw, and behold a pale horse; and he that sat upon him his name was Death, and hell followed with him. And there was given unto them power over the fourth part of the earth, to kill with sword, and with famine, and with death, and by the wild beasts of the earth.

7. "And when he had opened the fourth seal," signifies prediction still further manifested (n. 378); "I heard the voice of the fourth animal saying," signifies out of the inmost heaven from the Lord. n. 379); "Come and see," signifies attention and perception (n. 380).

8. "And I saw, and behold a pale horse," signifies the understanding of the Word then become nought in consequence of evils of life and then of falsities therefrom n. 381; "and he that sat upon him," signifies the Word (n. 382); "his name was Death, and hell followed with him," signifies eternal damnation (n. 383); "and there was given unto them power over the fourth part of the earth, to kill," signifies the loss of every good and thence of every truth from the Word, and in consequence, in the doctrine of their church from the Word n. 384; "with sword," signifies by falsity (n. 385); "and with famine," signifies by the loss, lack, and ignorance of the knowledges of truth and good (n. 386); "and with death," signifies the consequent extinction of spiritual life (n. 387); "and by the wild beasts of the earth," signifies the evils of life or lusts and falsities therefrom springing from the love of self and of the world, which devastate all things of the church with man n. 388.