The word "principled" means to have strong beliefs and values, and to act according to those beliefs and values in a consistent and ethical manner. Full definition
The trouble is that «spiritual but not religious» offers no positive exposition or understanding or explanation of a body of belief or set of principles of any kind. (religion.blogs.cnn.com)
Based in principles of collaborative inquiry through teacher study groups, we explored how to solve numerous problems of practice. (ciera.org)
Dog training should be straightforward, consistent and based on principles of learning. (potty-train-dogs.com)