An attacker throws a punch, I blend with his energy and throw him… that’s Hapki (harmonious energy).
A man on the street speaks to me aggressively, insulting me. I wave him off and walk away. That’s Hapki as well.
A stranger smiles and says, “Good morning.” I smile back and return the greeting. That too is Hapki.
These are all steps on the way that is Hapkido.