Cant, Moral Duty, Is Clouded by Fellow Feeling

For cant, moral must come from reason and the motive has to be respect for the moral law. So going back to can for kant, moral duty was actually clouded by fellow feeling,. You couldn't be sure that you are acting out of the right motive. If i feel compassion for somebody lying injured in the road, and i act to help them, it could be just acting out of my passing emotion. And that's not available to everybody, because not everybody's got a compassionate nature.