God gave us an internal sense of right and wrong so that we could deem whether our own actions were good or evil. It is so that we can live our lives according to His Word and not condemn others who don't agree with us.

As for the second sentence, God's Word is what guides my sense of internal justice. I kind of prefer NLT but NIV is much more of a standard. Is that what you were asking?

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"Masters of War" by Bob Dylan
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-Thomas Jefferson
"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones."
-Albert Einstein
"One man with courage is a majority"
-Thomas Jefferson