Reason is Useless without a Moral Law

We have been looking at ways that try to start from the ground up in establishing morality from rational agency.

My whole point in the last few posts has been to prove that reason alone (without our human nature having a moral law) can not give us a reason why we should be moral or even what should be classed as morality.

"As Any reason for being moral must be either a moral or a nonmoral reason. If it is moral, then it cannot really be a reason for being moral, since you would have to be already inside morality in order to accept it. A nonmoral reason, on the other hand, cannot be a reason for being moral; morality requires a purity of motive, a basically moral intentionality, and that is destroyed by any nonmoral inducement. Hence there can be no reason for being moral, and morality presents itself as an unmediated demand, a categorical imperative."

Without God's moral law on our heart, reason is useless in defending morality and goodness.