Application of humility is service.
To be meek and humble means to have a service attitude towards God, the Vaisnavas, and all living beings. Unless we have that, our chanting will have minimal effect and many births may pass before we finally come to the conclusion.
The flip side of happiness is suffering.
Compassion without detachment is attachment to the bodily platform.
Preaching means to awaken the real inclination to serve God.
Spirituality is based on development of character and philosophy.