As for ho-shin, shi-shin, mu-shin (a state of mind free from delusion, shikisokuzeku - form is emptiness, matter is void, all is vanity, and I exist because I think), zan-shin, tan-shin and ren-shin, see the article of Kyudo (Japanese art of archery) or Kyujutsu (Japanese art of archery) for details.
放つ心・止める心・無の心（無我の境地、色即是空、我考える故我在り）・残す心・丹ずる心・錬る心について詳しくは弓道または弓術を参照。