[Heartlander]

…I know that some things are good.

I would not say ‘things’ (material) are good. You can use ‘things’ for good and evil, but a material ‘thing’ is not comprised of good – i.e. money is neither good nor evil. I apologize if I misunderstood what you meant by ‘things’.

That being said, if we know that good does exist, where does good exist? It is not a material ‘thing’.

[BikerNYC]

Money can be good or evil. We speak of blood money, evil money, all the time. We say, "that is an evil dog," or "that is a good baby." We do perceive things, as well as actions and intentions, as having the quality of good and/or evil.

"Good" exits in the same sense that "loud" exists. Where does "loud" exist? Where does "red" exist? Or how about "beauty"? Loud, red and beauty exist, as does good; they are qualities we perceive.