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.

4508. 'And all their wealth' means all factual knowledge which they had acquired for themselves. This is clear from the meaning of 'wealth' as factual knowledge, as may be seen from many places in the Word. For spiritual wealth, and so the wealth that is meant in the spiritual sense, is nothing other. Insofar as such wealth consists in actual knowing, it is factual knowledge. In the Lord's kingdom, and therefore in the Church, that knowledge exists in place of material wealth, as will be substantiated in the Lord's Divine mercy from other places in the Word.