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.

Finding, or being found, can have different meanings in the Word, depending on the context. Here are two examples:

From Arcana Coelestia 5756, 'Behold, the silver which we found in the mouth of our pouches' means when truth freely given.

In Revelation 18:21, we find this: "And one strong angel took up a stone like a great millstone, and cast it into the sea, saying, Thus with violence shall that great city Babylon be cast down, and shall not be found any more." Here, "to not to be found any more," signifies not to rise again, according to Apocalypse Explained 1183.