Why Do Catholic Saints Receive the Stigmata?

In the history of the church numerous Saints have been given the stigmata, the physical wounds of Christ, as an outward sign of how they are living their lives. Jesus told his disciples 'If any man would come after me, let him deny himself and take up his cross daily and follow me' (Luke 9:23) In order to become holy we must become like Christ, and this includes making sacrifices.