He has no other business than to love Kṛṣṇa. This is the symptom of sādhu.
Lecture on SB 1.2.12 -- Vrndavana, October 23, 1972: So this śraddadhānāḥ, if we have got little faith that... Just like people come here with little faith. That faith is the little spark of fire. Now you have to fan it, fan it, so that fire may increase. Tat śraddadhānāḥ munayaḥ. So śraddadhānāḥ, Rūpa Gosvāmī has given us the formula that if you have got little faith in for understanding the Absolute Truth, Bhagavān, then ādau śraddhā tataḥ sādhu-saṅgaḥ [Cc. Madhya 23.14-15], associate with sādhu. Who is sādhu? Sādhu means devotee. Kṛṣṇa says, api cet su-durācāro bhajate mām ananya-bhāk, sādhur eva sa mantavyaḥ [Bg. 9.30]. He's sādhu. Not a sādhu having big beard or mustaches and having red cloth without any sense of Kṛṣṇa. He's not sādhu. Sādhu means one who is fully engaged in the service of the Lord. He's sādhu. Api cet su-durācāraḥ. Even if he's not very well-behaved, su-durācāra, still he's sādhu. Why? Bhajate mām ananya-bhāk. He has
no other business than to love Kṛṣṇa. This is the symptom of sādhu.
So sādhu-saṅga means: Ādau śraddhā tataḥ sādhu-saṅgaḥ [Cc. Madhya 23.14-15]. Sādhu-saṅga means to associate with the devotees of Kṛṣṇa. Ādau śraddhā tataḥ sādhu-saṅgo 'tha bhajana-kriyā. Sādhu-saṅga. As soon as these boys... They first of all, they come out of inquisitiveness to our several centers. Gradually, they shave their head and try to understand the books and literature. They then come forward: "Swamiji, give me initiation. Make, get me the sannyāsī-āśrama." Gradually they come. So ādau śraddhā tataḥ sā... Sādhu, this is the effect of sādhu-saṅga. Caitanya Mahāprabhu has said,
- sādhu-saṅga sādhu-saṅga sarva-śāstre kaya
- lava-mātra sādhu-saṅge sarva-siddhi haya
- [Cc. Madhya 22.54]
Actually, if one associates with a sādhu, with a pure devotee of Lord, then certainly it will be effective. Certainly. This Kṛṣṇa consciousness society is meant for giving opportunity to the people to make association with bhaktas. By association with bhakta, devotees, they'll become also bhakta. Saṅgāt sañjāyate kāmaḥ. If you associate with drunkards, then you gradually become a drunkard. But if you associate with devotees, gradually you become a devotee. This is natural sequence.