Pain and Suffering

An oft repeated saying by Hazrat-O-Aala Maulana Shah Abrarul Haque Sahab Haqqi (may Allah Almighty fill his tomb with light) has in it the instruction that during pain and suffering remember that Allah is Sovereign and All-Wise (Haakim and Hakeem). Being Sovereign He has all the Authority over us. Being All-Wise His actions are the best for me. So why to worry-even in the most difficult times?