YHWH-ROHI (yah-way-roh-hee);  "The Lord Our Shepherd" is a very personal statement, a very personal commitment from YHWH to you.  He is YOUR Shepherd.  He is MY Shepherd. Yahweh is my shepherd; I will not lack for anything.  How is that possible?  And, What does that mean?  How is it possible that with all of the challenges, trials, tribulations, tragedies, sicknesses, persecutions, separations, Alzheimer's, unknowns, the aging and decaying process of life, etc... and even death, that the Lord is my Shepherd, shall YOU and I SHALL NOT WANT?