Being obligated to do something is spoken of as if the duty to do something is on a person. AT: "I must fulfill my vows to you" or "I must do what I promised you I would do" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The feet here represent the person. Falling here probably represents being killed by his enemies. AT: "you have kept me from falling" or "you have kept me from being killed by my enemies" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
Living and being seen by God is spoken of as walking before God. AT: "so that I may live in God's presence" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Here "the light of the living" probably represents God's enabling people to live. AT: "with the life that you give" or "because you enable me to live" (See: [[rc://en/ta/man/translate/figs-metonymy]])
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