The Markkula Center for Applied Ethics at Santa Clara University has some really useful thinking and curricula around ethics. One of the things they point out is that what ethics is not is easier to talk about than what ethics actually is. And some of the things that they say about what ethics is not include feelings. Those aren’t ethics. And religion isn’t ethics. Also law. That’s not ethics. Science isn’t ethics.
Lack of attachment…does not mean disconnection from the world and others, but ability to control what can be controlled: the self, rather than consequences. It is about detaching our motivation from the results of an action so we do not lose sight of what else is important: a sense of perspective.