I know it's a pastor thing but I really enjoy getting all the meat off the bone. "Pascho" is the root word here (infinitive aorist active). As a root it very appropriately appears 40 times and means- you guessed it- "suffering". Jesus was "a man of sorrows" who being very God emptied himself to become our example of a man filled with the Spirit. He suffered and bled and died so we may live. He proved by His resurrection that He defeated death and then spoke again of the things written of Him. Why do people celebrate his suffering you ask - we celebrate the passion that leads to life. We know that even though suffering may be long and last for a week Sundays coming.