  Rosmini’s ethical philosophy springs directly from the analysis summarised in the previous section. For him, ‘the human being is a knowing and feeling subject whose will, as supreme principle of activity, provides the basis of the incommunicable individuality that constitutes each real human nature as a person’ (Life, p. 26). ‘Person’, as supreme principle, is also the subject of moral activity, and is to be distinguished from all those habits and acts within human beings which take place without the necessary intervention of the person or, at most, effect the person indirectly. For example, a good pianist is not necessarily a good person. Morality deals necessarily with what people do as persons, with what affects themselves as subjects who cannot step aside from the truth they know without violating their adherence to truth. Rosmini deals with ethics, the science of morality, in his Principles of Ethics and in Comparative and Critical History of Systems dealing with the Principle of Morality. The History first offers an overview of systems which throughout history deny morality, or make it impossible, or provide it with a subjective foundation. It then moves on to summarise the objective view expressed by philosophers and developed by Rosmini in Principles of Ethics .