why must islamic psychology?

islamic world view is the how islam look at the reality, and how islam know about reality. according to islam, reality consist of :
observable area
conceivable area
unconceivable area.
there are two basic reasons why we need islamic psychology:
1. because islam has concept about human
alquran by main source of islam is the al huda(kitab petunjuk) that contains a secret thing about human. so if we want to know more about the real human we must open alquran .
2.we know that modern psychology is confronted by many crisis
many psycolog, not only islamic psycolog,but also europan psycholog have given many crytics about modern psychology