“The Son of man must suffer many things[…]”
What must we do in life? As the old saying goes, “There are only three things you must do in life: be born, die, and pay taxes.” I don’t think anyone actually lives like that though. We all have hopes, desires, expectations, plans, responsibilities, schedules, etc. The most needful things are the ones we have or feel like we have control over and that affect our happiness. If something affects our happiness negatively – not just our feeling of joy or contentment – and we have no control over it we should probably reexamine why it seems so important.