Heart
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.
Numbers 5:1-6
1
Yahweh spoke to Moses, saying,
2
"Command the children of Israel that they put out of the camp every leper, and everyone who has an issue, and whoever is unclean by the dead.
3
Both you shall put male and female outside of the camp; that they not defile their camp, in the midst of which I dwell."
4
The children of Israel did so, and put them out outside of the camp; as Yahweh spoke to Moses, so did the children of Israel.
5
Yahweh spoke to Moses, saying,
6
"Speak to the children of Israel: 'When a man or woman commits any sin that men commit, so as to trespass against Yahweh, and that soul is guilty;
