Talking of the issue of why there is so much suffering in the human world, people often ask: ‘If God is All-Good, why did He make such a world where people are forced to face different types of problems and where there is so much suffering?’
This question can be answered by understanding the creation plan of God. Unpleasantness has been put into this world for man to learn proper lessons from it. The true lesson taught by unpleasant experiences is that man should remember the next world of Paradise where there will not be any suffering. Having understood the creation plan of God, one’s approach to life should be: “Let me not suffer in the Hereafter what I have suffered in this world.” This understanding should make one strive for Paradise in the Hereafter one’s very purpose in life.
Source: God’s Creation Plan