So this is the difference between sādhana-siddha and nitya-siddha. Gaurāṅgera saṅgi-gaṇe, nitya-siddha kari' māne, se yāya vrajendra-suta-pāśa. Gauḍa-maṇḍala-bhūmi, yebā jāne cintāmaṇi, tāra haya vrajabhūme vāsa. So nitya-siddha means he has no chance to forget Kṛṣṇa. That is called nitya-siddha. And sādhana-siddha means by following the regulative principles, the rules and regulations, one revives his Kṛṣṇa consciousness. Both things are siddha because you cannot revive Kṛṣṇa consciousness without being Kṛṣṇa conscious. It may be covered. So nitya-siddha means he does not get covered by the influence of material nature about his natural devotional tendency to serve Kṛṣṇa. He never becomes covered. This is difference. Kṛṣṇa gives him chance to get birth in such a family. Just like Parīkṣit Mahārāja, that he never gets the chance of forgetting Kṛṣṇa. So one who does not get the chance of forgetting Kṛṣṇa is called nitya-siddha. This is the difference.
And sādhana-siddha means one has forgotten Kṛṣṇa. That is the position of all materialistic men. Every one of us forgotten. But even though forgotten, the thing is there. It has to be awakened only. And the awakening process is hearing. Just like you are out of your family touch for many years. Practically, you have forgotten. Now, if somebody comes to you, some friend, "Do you remember your child, when he came out, he was such little, and now he is grown-up? Now he's this, that, so on." If for some days this topics of the family is... then again he becomes attracted: "Let me go and see." It is natural. Similarly, anyone who has forgotten Kṛṣṇa somehow or other—the cause may be so many—but if he is given chance to hear about Kṛṣṇa... Śṛṇvatāṁ sva-kathāḥ kṛṣṇaḥ.
- śṛṇvatāṁ sva-kathāḥ kṛṣṇaḥ
- puṇya-śravaṇa-kīrtanaḥ
- hṛdy antaḥ-stho hy abhadrāṇi
- vidhunoti suhṛt satām
- (SB 1.2.17)
As soon as somehow or other one begins to hear about Kṛṣṇa. Either by his natural inclination or by chance or any way, he comes to hear about Kṛṣṇa, attempts hearing about Kṛṣṇa, then... Kṛṣṇa is within everyone's heart, Paramātmā. So Kṛṣṇa helps him immediately. Kṛṣṇa helps both ways. If you want to forget Kṛṣṇa, Kṛṣṇa will help you with that, so that you will be able to forget Kṛṣṇa. Similarly, if you want to revive your lost relationship with Kṛṣṇa again, Kṛṣṇa will help you.