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.

6234. 'And now your two sons born to you in the land of Egypt' means goodness and truth within the natural that come from the internal. This is clear from the representation of Manasseh and Ephraim, to whom 'two sons' refers here, as the Church's will and the Church's understanding within the natural, which are born from the internal, dealt with above in 6222 (and since good belongs to the will and truth to the understanding, the Church's goodness and truth are meant by those same sons); from the meaning of 'born to you' - to Joseph - as that come from the internal; and from the meaning of 'the land of Egypt' as the natural mind where the Church's factual knowledge resides, dealt with in 5176, 5178, 5280, 5288, 5301, and as the natural, 6147.