The science and sequence

First you meet with devotees
Then you hear
Then you try it out
Then you decide to join
Then you surrender to Krishna
Then He shows you your Guru
Then you chant offensely to please your Guru and he pleads with Krishna to save you

Chanting offenselessly is the way to reawaken love of Krishna
It comes by chanting in the association of pure devotees and freedom from association with nondevotees
It comes from attentive constant chanting in humility in the mood of a wretched beggar
It comes through mercy when bad habits are admitted and rectified
It comes when all six enemies of lust anger greed envy pride and madness are defeated
It comes when the mind is cleaned up and controlled
It comes when one surrenders to the process, making sadhana the first priority in life
It comes through voluntary austerity to attain the goal
It comes only when we really know how much we need it and work toward being worthy of it.
The instructions of guru and acaryas are key.
One has to be sincere serious and willing to act on the knowledge one has
Pride is a big obstacle
Trinad api sunicena... let it be as Krishna wills I accept all of it as mercy.
When honor and dishonor are the same.
When we beg for the false ego to be cured and it becomes cured.

That is when the love reawakens.
By eating ucchista
By serving through hearing the pure message

This is my understanding of the science of devotion.