Christ's Triumph on the Cross defeated sin and death.  It was a triumph of love over selfishness.  This victory needs to be repeated in our own lives, in our own carrying of the Cross.  Sin and selfishness have to be defeated in us and this entails the acceptance of suffering and sacrifice; in a word the acceptance of the Cross.   Suffering is inevitable in life, but whether it is redemptive and sanctifying or futile and permanent is truly up to us.