This could be stated in positive form. Alternate translation: "Only he who carries his own cross and comes after me can be my disciple" or "If anyone wants to be my disciple, he must carry his own cross and follow me" (See: [[rc://en/ta/man/translate/figs-doublenegatives]])
Jesus does not mean every Christian must be crucified. The Romans often made people carry their own crosses before they crucified them as a sign of their submission to Rome. This metaphor means they must submit to God and be willing to suffer in any way to be Jesus's disciples. (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-explicit]])