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.

The idea of "lifting" is used in a number of different ways in the Bible. In general, it means connecting with a higher spiritual state for strength or enlightenment, though as with many verbs the context makes a great deal of difference. One of the most common uses comes as people lift up their eyes, which usually means coming into a state of perceiving what is true from the Lord. Lifting a hand or a rod means wielding power, making it common in the performance of miracles. Lifting the feet means elevating the most natural, external aspects of our day-to-day lives. Lifting objects means elevating them to higher uses, or sometimes just to protect them (Noah's Ark was "lifted up" in this sense). And so forth. In the negative sense, people can lift things up -- towers or other human structures -- representing a deeper state of the love of self.