And who is sādhu? Sādhu, sādhavaḥ sādhu-bhūṣaṇāḥ. Titikṣavaḥ kāruṇikāḥ suhṛdaḥ sarva-bhūtānām. So sādhu means very tolerant. In another place, sādhu is described in the Bhagavad-gītā: bhajate mām ananya-bhāk sādhur eva sa mantavyaḥ (BG 9.30). Api cet su-durācāro bhajate mām ananya-bhāk sādhur eva...
In another place in the Bhāgavata the sādhu is described:
- titikṣavaḥ kāruṇikāḥ
- suhṛdaḥ sarva-dehinām
- ajāta-śatravaḥ śāntāḥ
- sādhavaḥ sādhu-bhūṣaṇāḥ
- (SB 3.25.21)
A sādhu, the first qualification is he must be a staunch devotee of Kṛṣṇa or God. Whatever you say. That is sādhu. That is the basic definition... Religion means to abide by the orders of God. And sādhu means who is staunchly a devotee of Kṛṣṇa. These are the description of sādhu.