hear from the mouths of pure devotees who speak from the core of their hearts

SB 4.20.24

na kāmaye nātha tad apy ahaṁ kvacin
 na yatra yuṣmac-caraṇāmbujāsavaḥ
mahattamāntar-hṛdayān mukha-cyuto
 vidhatsva karṇāyutam eṣa me varaḥ

My dear Lord, I therefore do not wish to have the benediction of merging into Your existence, a benediction in which there is no existence of the nectarean beverage of Your lotus feet. I want the benediction of at least one million ears, for thus I may be able to hear about the glories of Your lotus feet from the mouths of Your pure devotees.

From the purport Text 24:

1. Mahārāja Pṛthu wanted to have a million ears to hear the glories of the lotus feet of the Lord. He specifically mentioned that the glories of the Lord should emanate from the mouths of pure devotees, who speak from the cores of their hearts. It is stated in the beginning of Śrīmad-Bhāgavatam(1.1.3), śuka-mukhād amṛta-drava-saṁyutam: the nectar of Śrīmad-Bhāgavatam became more relishable because it emanated from the mouth of Śrīla Śukadeva Gosvāmī. 
2. One might think that these glories of the Lord can be heard from anywhere, from the mouths of either devotees or nondevotees, but here it is specifically mentioned that the glories of the Lord must emanate from the mouths of pure devotees. 
3. The words satāṁ prasaṅgān mama vīrya-saṁvidaḥ (Bhāg. 3.25.25) mean that glorification of the Lord is potent when uttered from the mouth of a pure devotee. 

From the purport Text 25:

1. The transcendental vibration from the mouth of a pure devotee is so powerful that it can revive the living entity’s memory of his eternal relationship with the Supreme Personality of Godhead.
2. The Lord asks every sleeping living entity to get up and engage in devotional service so that his mission in this human form of life may be fulfilled. This awakening voice comes through the mouth of a pure devotee.
3. A pure devotee always engages in the service of the Lord, taking shelter of His lotus feet, and therefore he has a direct connection with the saffron mercy-particles that are strewn over the lotus feet of the Lord. Although when a pure devotee speaks the articulation of his voice may resemble the sound of this material sky, the voice is spiritually very powerful because it touches the particles of saffron dust on the lotus feet of the Lord. 
4. As soon as a sleeping living entity hears the powerful voice emanating from the mouth of a pure devotee, he immediately remembers his eternal relationship with the Lord, although up until that moment he had forgotten everything.
5. 
   

What attracts the Most Attractive?

SB 4.20.20

prasthānābhimukho ’py enam
 anugraha-vilambitaḥ
paśyan padma-palāśākṣo
 na pratasthe suhṛt satām

The Lord was just about to leave, but because He was so greatly inclined toward the behavior of King Pṛthu, He did not depart. Seeing the behavior of Mahārāja Pṛthu with His lotus eyes, He was detained because He is always the well-wisher of His devotees.

From the purport:

Here the words suhṛt satām are very significant. The Supreme Personality of Godhead is always very inclined toward His devotee and is always thinking of the devotee’s well-being. This is not partiality.

What can we do to hold the attention of the Lord?

Develop :

• A Service Attitude towards His devotees
• Continuously engage in chanting the Holy Names, His glories and engaging in some responsible time bound service to Him
• Consistently engage in mindful hearing of Srimad Bhagavatam
• Develop Vaishnava Qualities