Oh goody! Let's try it!
A subjective truth that God would agree with, or something that I think is true about the nature of God that would lead to a certain type of action? let's go with burglary. I think that God would not like people who rob the homes of others.
Then we live as though we believe this concept to be true. So let's live as though we think theft is okay. Luckily, we don't need to do this, because there are lots of people who do live like this and we can look at them instead of having to do it ourselves.
There are many home burglaries that go unsolved, and yet there are cases of burglars being shot and killed by the home owners. Wow, what do we do with such wildly different results?
What do the results tell you about what God thinks of robbing people's homes?
You see, the problem with this is that you are looking at what happens to you to figure out what God thinks of it, when your experiences are statistically insignificant in the real world. If you decide to see if vegetarianism is wrong, so you become a vegetarian for a little while and you get bad stomach aches, does that mean that all vegetarians are wrong and will be punished by God? After all, they have tried vegetarianism and it works fine! So why would God say it is bad for you, but okay for other people?
And do you really risk bringing the wrath of God down upon you to find out if it's okay? I mean, isn't that a bit like finding out if a liquid is poisonous by drinking it and seeing if you die?