How do you know when you have shinjin?
Probably, it is an “awakening” that just happens. And if you think you have it, then it is sure sign that you do not. It is part of having no-ego, so thinking I have Shinjin is the ego-self expressing itself, thus negating non-ego.
It seems that it is more a “sense” of freedom and being free of the ego-self. In short, it can be observed in others, but not something that we can know for ourselves, which means, one cannot know if he/ she has Shinjin.
Gassho (with palms together), Rev. Ron