Śrīla Prabhupāda Says

Therefore we have to cleanse our heart. Our heart is always aspiring how to get money, how to get women, how to get prestige, how to become leader, how to become minister, how to become guru.

These are the things, always hankering in our heart. Therefore Caitanya Mahāprabhu says, ceto-darpaṇa-mārjanam [Caitanya-caritamrtha. Antya 20.12]. First of all cleanse your heart. And that is also said in the Śrīmad-Bhāgavatam, that naṣṭa-prāyeṣv abhadreṣu nityaṁ bhāgavata-sevayā [Srimad-Bhagavatam 1.2.18]. Nityaṁ.

Not seven days. Nityaṁ. Read every day. Especially those who are in Vṛndāvana. Every day, as much as possible, read Śrīmad-Bhāgavatam, Bhagavad-gītā. Nityaṁ.

Then our heart will be cleansed, and we shall know what is our constitutional position, what is our relationship with Kṛṣṇa, and then if we serve in that relationship, our life is perfect.

[SB: 2.1.1. Lecture - Vṛndāvan, March 16, 1974]