Why dont people i.e christian's question there existence on Earth?

This is a question that depends on what you believe. Until you figure that out the answer will always be elusive.Asking questions help bring clarity to situations that affect our lives. A question brings answers to the fore front. The purpose of life is that which we seek. What do you seek? A question is also sometimes the very answer we need to continue. Is there more to life then this? The answer is Whatever you make of your life. One question that may help is What do I seek out of life? The next would be do others seek the same? When you answer these questions then you will have your answer.