正心
zhèng​xīn

to rectify one's heart

正心 zhèng​xīn
to rectify one's heart
To set one's heart on the right path or correct one's mindset; a concept from the Confucian classic "Great Learning" as one of the steps to self-cultivation.
upright heart
An upright, fair, and selfless mind; integrity.
orthocore
The center of a polygon or geometric figure, specifically used in certain mathematical or technical contexts