Today Luke said, "Why does it feel good to tell the truth?"
This may have been prompted by the fact that I mentioned it's important to tell the truth after he said it wasn't cold outside, when in fact we received our first snowfall today.

We talked about the conscience and how doing the right thing feels good and doing the wrong thing feels bad, and how that helps you know right from wrong.

Then he got sort of sad and said, "Whenever I hurt someone accidentally, then I cry."

I told him that that is because it's wrong to hurt people, and he feels bad even thought he didn't do it n purpose, and that is how he know he is a good person. That seemed to help.