It is the Bible that teaches us about God, his qualities, his personality, as well as his dealings with people over thousands of years.
وَقَدْ زَوَّدَنَا يَهْوَه بِكَلِمَتِهِ ،‏ ٱلْكِتَابِ ٱلْمُقَدَّسِ ،‏ لِكَيْ نَتَعَلَّمَ عَنْهُ .‏