while i agree with you that we are supposed to use our minds and reason, I dont think it means God expects us to reject his truth or his morals or standards.
We should use our powers of reason to learn the will of God. Mankind are already led astray through the proliferation of independent thought. Thousands of different religions, different ideologies, different standards and morals
If you use your powers of reason, you should be able to determine if all this independent though has brought about a better peaceful happy world. And if it hasnt, then you should dig a little deeper and ask 'why' things dont get better when mankind have 'independent thought'.