BHAKTI YOGA, By Swami Sivananda
Bhakti can be acquired and cultivated. Constant Satsang with devotees, repetition of the Lord's name, constant remembrance of Him, prayer, study of religious books such as Ramayana, Bhagavata, the Gita etc, singing praises of the Lord and service of Saints - all these can infuse Bhakti in your heart
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji
So also when an ignorant, bound and sorrow-stricken soul comes in contact with an illumined, liberated and all-blissful person, the former by such contact is fired with a zeal to become also like the latter.
God gives whatever is required (by His devotee), removes whatever is not needed, leads the devotee in the path suited to him/her; Since Bhagavãn takes utmost interest in the devotee's needs the latter will not earn/attain any 'siddhi'
By repeatedly chanting the Divine Name of Lord Hari, one attains all siddhis (powers). When Lord, the Consort of Goddess Shridevi, and the Lord of the world, is pleased, what remains an impossibility on this earth?