Please tell me where in the Quran it tells you
how to pray? Where does it tell you
all the
types of prayers? Where does it tell you the
details of Zakah? The Adhan? The minimum value for a theifs hand to be cut? And there are many many other such examples.
You need the Hadiths to fully understand the Quran. If the Quran was all that was needed Allah would have revealed the Quran on top of a mountain but he sent it with a Man. The Prophet :arabic5: . In order that we can understand the Quran and know how it is applied. So he can teach us the
Hikmah, which is so often mentioned in the Quran. Ask yourself that, what does Allah mean when he speaks of the Hikmah?
And if Allah mentions it and says that He gave the Prophet that, then it becomes incumbent for Allah to preserve it so Mankid can learn from it.
Again, if you take only the Quran you wont have any Islam. The Quran and the Hadiths/Sunnah go hand in hand. The Quran inevitably leads you to the Sunnah. Go read up on the preservation of the Hadiths. They have been protected in such a way that the protection upon them is second only to the Protection given by Allah to the Quran.