If you do not understand Kṛṣṇa, if you do not surrender to Kṛṣṇa, then you are simply wasting your time. There is no meaning of writing big, big comments on Bhagavad-gītā, uselessly waste your time and waste others' time. This is the real problem: śraddhā. Kṛṣṇa said, by surrendering to Kṛṣṇa everything will be done. Ahaṁ tvāṁ sarva-pāpebhyo mokṣayiṣyāmi. So if one has no śraddhā, faith, on this instruction of Kṛṣṇa, man-manā bhava mad-bhakto mad-yājī (BG 18.65), then there is no use; simply waste of time.
If we come to this point, ādau śraddhā . . . this is called śraddhā. Then the next stage is ādau śraddhā tataḥ sādhu-saṅgaḥ (CC Madhya 23.14-15). If one has . . . one is convinced that "Surrendering to Kṛṣṇa, my all business will be perfect," this is called śraddhā. Then we have to seek out who are engaged in Kṛṣṇa consciousness, sādhu-saṅga (CC Madhya 22.83). Sādhu means Kṛṣṇa conscious person. Sādhu does not mean having a big beard and nice dress or saffron-colored dress. That is not sādhu. Sādhu is described in the Bhagavad-gītā, api cet su-durācāro bhajate mām ananya-bhāk, sādhur eva sa mantavyaḥ (BG 9.30). That is sādhu, who has no other business than to serve Kṛṣṇa. He is sādhu.
He is sādhu because he has accepted the principle, sarva-dharmān parityajya mām ekam (BG 18.66). Sādhur eva sa mantavyaḥ samyag vyavasito hi saḥ (BG 9.30). You cannot say: "Oh, he has got some bad principle in his life. Although he is worshiping Kṛṣṇa wholeheartedly, but he has got some defect." Therefore Kṛṣṇa says, api cet su-durācāraḥ. Even if he has got so many defects of his life, because he has dedicated his life for Kṛṣṇa's service, sādhur eva sa mantavyaḥ. So if you have got śraddhā that by surrendering to Kṛṣṇa your all purpose of life will be practical or fruitful, then you have to associate with such persons who are engaged in the service of Kṛṣṇa, sādhu-saṅga (CC Madhya 22.83). Ādau śraddhā tataḥ sādhu-saṅgaḥ.
Therefore our this movement is called International Society for Kṛṣṇa Consciousness. So actually, one by one, as people are coming to the association of Societies, automatically he is becoming Kṛṣṇa conscious. That is practical. Ādau śraddhā tataḥ sādhu-saṅgaḥ. This is sādhu-saṅga. Sādhu-saṅga does not mean to associate with some saffron-colored men. Sādhu-saṅga means to associate with Kṛṣṇa conscious person. This is śāstra. Ādau śraddhā tataḥ sādhu . . . this is Rūpa Gosvāmī's direction, that if you want to develop your love for Kṛṣṇa, this is the process.