Setsu preached that Li and Qi closely interact, as opposed to Li precedes Qi of Chu His, and between 'Kakubutsu' (perceiving things or reading their information to reach the essential law) and 'Kyokei' (keep the mind calm, concentrating consciousness at all moments in daily life), he valued 'Kyokei.'
薛は、朱熹が理先気後とするのに対して理気相即を唱え、また「格物」と「居敬」では「居敬」を重んじた。