Paul speaks of the cross as a container and of power as a physical thing that Jesus can put in that container. This can be stated in active form. Alternate translation: "such words would not empty the cross of Christ of its power" or "people should not stop believing the message about Jesus and start thinking I am more important than Jesus" (See: [[rc://en/ta/man/translate/figs-activepassive]] and [[rc://en/ta/man/translate/figs-metaphor]])