In Bhakti maarg, Lord Himself prepares the surrendered being for enlightenment. He not only removes its impurities but also adorns it with the divine attributes like forbearance, benevolence, endurance etc so that it can feel united with Him. However there are two determinants to be taken care of - concentration and duration of being in this state of Union. Both of these factors depend upon our passion to get involved with Him by experiencing His obvious presence.