Why Do We Have to Suffer?

Jesus said "Blessed are the poor in spirit." Matthew 5:3

How can this be? How can I be blessed if I am suffering? What good does suffering do? . Philip Yancey says:

"Blessed are the poor in spirit." Why? Because "theirs is the kingdom of heaven" (Matthew 5:3)
The poor, the hungry, the mourners, and those who suffer are blessed (Matt. 5:3-6) because their lack of self-sufficiency is obvious to them every day. They must turn somewhere for strength. People who are rich, successful, and beautiful may go through life relying on their natural gifts. But people who are needy, dependent, and dissatisfied with life are more likely to welcome God’s free gift of love.