If you observe nature, do you not see that everything is fulfilling a function, example - trees give us oxygen and fruit, the clouds give us rain, the moon orbits the earth, our hearts pump blood, our lungs give out carbon dioxide,
in other words everything is following a set of rules, a code of conduct, a law and order, that is why are is in a state of peace!
But us humans have the ability to make our own choices, shouldn't we to be fullifilling a function, following a set of rules,
what about our intellect we have been given shouldn't that be fulfilling a function?
Definition of islam is to submitt your will to god to acquire peace!
Shouldn't we reason to come to the truth? See the evidences and proofs before we believe something?
any way check this out!
YouTube - miracles of quran
If any one is interested i have more interesting info.