Summary: Inner peace is true happiness. It has an aspect of a pleasant feeling, as well as a deep sense of restfulness. It also means to be without inner conflict. Epicureanism viewed it as a feeling, while Stoics viewed it as a result of living the virtues. In Buddhism it is equanimity (Pali: upekkha), and in Taoism it is tranquility (Chineses: níngjìng). There is a aspect of inner peace in Jain’s concept of moksha and the Buddhist concept of nirvana. In all these traditions, inner peace is part of the ultimate goal in this life.
