Does your God approve of pedophilia? Part 3: We can know what sin is by intuition?

 13 Come now, you who say, "Today or tomorrow we will go to such and such a city, and spend a year there and engage in business and make a profit."
 14 Yet you do not know what your life will be like tomorrow. You are just a vapor that appears for a little while and then vanishes away.
 15 Instead, you ought to say, "If the Lord wills, we will live and also do this or that."
 16 But as it is, you boast in your arrogance; all such boasting is evil.
 17 Therefore, to one who knows the right thing to do and does not do it, to him it is sin.
(Jas. 4:13-17 NAU)

This verse proves nothing, for even if we accept it as true, it is only saying that it is sin when we already know what the right thing to do is, yet we don't do it.

The question of what criteria we should use so that we can correctly identify what "the right thing to do" would be, is left unanswered.