With this metaphor, Paul speaks of a believer as a person who is spiritually united with Christ: as Christ died, so the believer has spiritually died; as Christ has come back to life, so the believer has come back to spiritual life, that is, to responsiveness to God. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Paul used this question to rebuke the Colossians for following the false beliefs of the world. Alternate translation: "stop submitting to the world's beliefs! Stop believing them when they say, 'Do ... touch'!" (See: [[rc://en/ta/man/translate/figs-rquestion]])