Before revision: Chán sī jīn () is not easily translated but refers to the development of a spiral (helical) refined force - rather than brute strength - and the ability to direct that to a point of application.
After revision: Chán sī jìn () is not easily translated but refers to the development of a spiral (helical) refined force - rather than brute strength - and the ability to direct that to a point of application.