Excerpts from a discourse by our Sri Sri Muralidhara Swamiji
Bhakti has to be practiced as a 'sadhana' (spiritual practice) to begin with. It is true, indeed, that Năma japa, kirtan, puja performed without involvement of the mind is useless; but how is involvement born? This is not a matter that comes about either on its own or suddenly. That which arises suddenly might disappear just as suddenly.
Therefore, just as we bathe, wear clothes, eat food, etc. whether our mind is involved in it or not, so too, should we do a certain amount of Năma japa, părayana, kirtana, vandanam every day. If we practice this ceaselessly we would find that gradually involvement comes about and thus one feels moved ('urukkam') and one-pointedness born.
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji