Earlier quoted context omitted.
The words "truth" and "god" are not synonyms. I don't know if there is a god, but I feel quite certain there are things that are true.
Why? Let me limit that a bit: why are there ethical/moral truths? There are probably statistical truths. Such as generally don't kill people. However, every society has loopholes or outs for such a law. What leads you to believe that there is a universal truth especially in light of the fact that the universe does little to actively preserve life, and doesn't seem to evolve too many creates that could even care.
In particular, there are only so many ethical systems that can work for a social species like ours.
If that is true, then our ethics predate humanity and are not arbitrary, or at least their core isn't. In some sense, then, our ethics are true and universal.