I define morals just fine without reference to any deity. Everyone can and many do, all around you partaking in society , every day.

I said it in another comment here but it's more like this to me:

You tell me it concerns you that, without fear of eternal consequences, I could commit all manner of atrocities with nothing to tell me that's wrong.

I respond by saying that it frightens me much more that, in the absence of God telling you so, you could think of nothing on your own that would prevent you from committing atrocities.