In Kali-yuga, only the mahamantra takes us to God; karma, jnana and yoga do not lead to God.
In the stage of the anarthas the sadhaka still does not feel love for the Lord.
By listening to Harikatha, purification slowly takes place.
Sloka that speaks of the cleansing of anarthas in the mirror of the heart: ceto-darpaṇa-mārjanaṁ bhava-mahā-dāvāgni-nirvāpaṇaṁ… (CC Antya-lila 20.12).