There is nothing higher than reason.
God's command 'Go ye, and preach the gospel to every creature' was the categorical imperative. The question of personal safety was wholly irrelevant.
All our knowledge begins with the senses...
There is only one categorical imperative in golf, and that is to hit the ball. There are no minor absolutes.
Morality, after all, has nothing to do with selflessness. On the contrary, self-interest is precisely the basis of the categorical imperative.
My conscience is informed by reason. It's like Kant's categorical imperative: behave to others as you would wish they behaved to you.