One is born to experience various kinds of joys and sorrows according to one's desire. For the time being, God comes to you in the disguise of suffering. He is purifying you in this manner. The suffering is for your own best. A mother gives a slap to her beloved child for its own good, in order to keep it on the right path. When a fond mother gives her baby a bath, the child may scream desperately, yet the mother will not let the baby go until she has thoroughly washed and scrubbed him.
Who is it that loves and who that suffers? He alone stages a play with Himself. The individual suffers because he perceives duality. Find the One everywhere and in everything and there will be an end to pain and suffering.