Light is often a metaphor for truth. Here, the spiritual truth the Savior will provide is spoken of as if it is a sunrise that lights up the earth. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Darkness is here a metaphor for the absence of spiritual truth. Here, people who lack spiritual truth are spoken of as if they are sitting in darkness. Alternate translation: "people who do not know the truth" (See: [[rc://en/ta/man/translate/figs-metaphor]])
These two phrases work together to emphasize the deep spiritual darkness of people before God shows them mercy. (See: [[rc://en/ta/man/translate/figs-doublet]])
The shadow often represents something that is about to happen. Here, it refers to approaching death. Alternate translation: "who are about to die" (See: [[rc://en/ta/man/translate/figs-idiom]])
Here "guide" is a metaphor for teaching, and "path of peace" is a metaphor for living at peace with God. The phrase "our feet" is a synecdoche that represents the whole person. Alternate translation: "teach us how to live at peace with God" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-synecdoche]])