Islam provides guidance, primarily through it's holy book Quran, and there is a need for guidance to paradise, this should be the ultimate goal of the guidance. Great sins like murder, adultery, idol worship are forbidden, Allah is the only God. Believers must be righteous, just to testify the truth and live in the truth. All this, and what is given in other writings, is also a guide and a way to come to heaven, for those who believe will receive great rewards of abundance in paradise.