The Psalmist is awe struck at how God has constructed each one of us as his children. I think of this now, as my niece is only a month pregnant and how tiny that embryo is inside of her right now, and what will happen 8 months from now when the baby is born. Wow what an awesome thought that is!!! Knowing that we are made right down to our inner most being, is more then I can phantom, and I believe that it is more then the psalmist could phantom also. The Psalmist asks God to search him and know what is in the psalmist heart. Test his thoughts, and lead the psalmist and us in the everlasting way.