God has made this world for the purpose of test. This world is a testing ground. Everything in this world is for the purpose of test. Whatever you receive here in terms of health, power, etc. are all test papers. They are not rewards. Nothing in this world is a reward. They are different parts of your test paper. 
                      One who takes the world as a testing ground will be on the right track. But if a person takes the present world as the final destination where he has to lead life with comfort and fulfil all his desires, then he will never achieve his goals. The world has not been made for comfort. The infrastructure of the world is not meant for this purpose. This infrastructure is meant for test, and not for enjoyment and comfort. 
                        The Prophet said: "O God, there is no joy except the joy of the Hereafter." This is big reality of life. Not knowing this makes people live in tension, stress and even commit suicide. Why? Because they spent their entire lives trying to achieve happiness, but do not find it. The truth is that happiness is not meant to be achieved. When the world is not meant to achieve happiness, how can you attain it here? In God's scheme of things, a person is not supposed to lead a life of bliss, then how can you have such a life here?
People are unaware of God's creation plan, they don’t know that the world is a testing ground. This is why they remain in tension. They seek to gather wealth, gain political power and build grand houses. Still they do not find peace. They want things which they will not get here. 
                  The Prophet said: "O God, there is no joy except the joy of the Hereafter." This world is a testing ground and not for achieving a life of happiness. One who understands this will not live in tension or frustration. He will never commit suicide. The above sentence of the Prophet contains a profound truth, rather the very secret of life.