“Even though I walk
Through the darkest valley,
I fear no evil.
You are with me.
Your rod and your staff,
They comfort me.”
David expresses complete confidence in Yahweh, his good shepherd. Even in the darkest valley, he has no fear of evil. The good shepherd is always with his sheep with a rod and staff to keep him and the rest of the sheep in line. The presence of this good shepherd comforts David and all his fellow sheep.
Eugene Finnegan Bible Project 