ייִדישער מחשבֿה אויף תהילים 139:13

THE SECOND: (debt to G-d for one's body) To bring oneself to an accounting for the great favor of G-d on him in composing his body and completing his form, his essence, and the anatomy of his limbs, taking him out of his mother's belly, and preparing his sustenance before this and after this - as fitting for him and according to the amount he needs - all this is a kindness of G-d on him. Let him think to himself, that if in his early creation he were lacking eyes or hands or feet, and a certain man was able to make them for him so that his body would be complete, how would he thank the man, and praise him, and be drawn to do his will, and cling to serving him. According to this one should correspondingly be drawn towards the Creator, who built his body and all of his limbs according to perfect functionality, as written "Remember now that You made me like clay and to the dust You will return me" (Iyov 10:9), and the rest of the matter, and "For You created my reins, You covered me in my mother's womb" (Tehilim 139:13).