At church the sermon was on Proverbs 4:23 Above all else, guard your heart, for it is the wellspring of life.
We discussed at first what images come to mind when we think about the heart.
One thing that a lady at church (who is a doctor) told us is that the heart is the first organ to be fully functioning when an baby develops in the womb. It is pumping, working, only three weeks after conception! Possibly even before the mother is fully aware she is pregnant her child's heart is beating within her.
How amazing is our God!