In plain words
To gain purity of feeling: that is Bhakti; the highest tapas is doing good to others; to do meritorious deeds: that is worship; the one who had these three qualities was Emperor Bali.
Embodiments of Prema!
Bhakti is to bring the form of the Trinity, the fullness of the three guṇas, onto the sacred path and to form a close bond and kinship with Divinity. Bhakti is to develop friendship with God through trikaraṇa śuddhi. Bhakti is of three kinds. Sāmānya Bhakti. Ekānta Bhakti. Ananya Bhakti.
Sāmānya Bhakti is:
listening, singing, remembering Viṣṇu, serving His feet, worship, salutation, service, friendship and the offering of the self.
The first is śravaṇa. The one who, forgetting his body and his home and keeping death before him, spent seven days in one-pointed thought of God, was King Parīkṣit. Though he was a king, to gain the divine Ātma-tattva and to experience Divinity and rejoice in it, he became one-pointed in mind, forgot his kingdom, forgot his body and his home, and listened for seven days. Listening alone is not enough. What has been heard must be reflected on, and what has been reflected on must be put into practice. This is what they have called śravaṇa, manana, nididhyāsa. The unity of these three is the royal road to attaining Divinity. The one who proclaimed to the world the feeling of śravaṇa, the principle of śravaṇa, was King Parīkṣit.
Kīrtanaṃ. The one who, by singing the Name of God at all times and in every state, created a divine atmosphere for the whole world, was Nārada, the mind-born son of Brahmā. The one who set up the right way to make one's birth fruitful through this kīrtana was the great sage Nārada. Sarvadā sarvakāleṣu sarvatra hari cintanaṃ. The one who experienced Divinity by singing the Name of Viṣṇu and made his life fruitful was Nārada.
Viṣṇusmaraṇaṃ. The supreme devotee who thought of God without ceasing was Prahlāda.