If I can point to one passage in scripture that encompasses it entirely from a Jewish perspective, it is:
If a prophet arises among you, or a dreamer of dreams, and gives you a sign or a wonder,
and the sign or wonder which he tells you comes to pass, and if he says, `Let us go after other gods,' which you have not known, `and let us serve them,'
you shall not listen to the words of that prophet or to that dreamer of dreams; for the LORD your God is testing you, to know whether you love the LORD your God with all your heart and with all your soul.
You shall walk after the LORD your God and fear him, and keep his commandments and obey his voice, and you shall serve him and cleave to him. (Deuteronomy 13:1-4)
For a Jew, this is black and white. God expects us to obey His commandments. We are to keep them and cleave to Him, no matter what.