Law Of Resonance : Membangkitkan Getaran Hati untuk Mereguk Kebahagiaan Sejati

I'm curious about what personal experiences or research led Pierre Franckh to emphasize resonance in personal development. Was there a pivotal moment that shaped this focus?

Some of the techniques felt simple yet profound, but I wonder if they work equally well for everyone or if I missed some nuances.

The idea is compelling, but I'm interested in hearing whether others have experienced noticeable shifts after applying the principles.