I learned this basic aspect of the SNT form when I first started learning Wing Chun 30 years ago. I didn't make it up.
If your SNT contains westernised teachings deriving from the noble eightfold path then probably somebody else added it on in the usual gap filling way some time after 1979. If your system incorporates actual buddhism then that's very interesting, but not particularly relevant to the VT system of Yip Man which does not contain such teachings