There are so many duties. You have got duty towards your family, towards your kinsmen, towards your country, towards the animals, other living entities, your obligation to the demigods, great saintly persons, ṛṣis. We are reading Vedas, but it is given by Vyāsadeva, so we are indebted to him. Similarly, many other śāstras we read.
So we are indebted. Devarṣi, ṛṣi, devatā, the demigods. We are taking sunshine; we are obliged to sun-god. We are taking moonshine; we are obliged to moonshine, uh, moon-god, the air-god, Varuṇa. Everyone, they are helping us. We cannot do without this. You cannot live without water. You cannot live without light. You cannot live without heat. So who is supplying? Of course, Kṛṣṇa is supplying, but we cannot see Kṛṣṇa directly. They are being supplied by different demigods. Therefore deva-yajña is recommended. Deva-yajña means ultimately to satisfy Kṛṣṇa.
So these are the processes. But if one takes to Kṛṣṇa consciousness, he has no more obligation to all these devatās. Devaṛsi-bhūtāpta-nṛṇāṁ pitṟṇām (SB 11.5.41). We have got so many obligations, but if you take to Kṛṣṇa consciousness, everyone will be pleased, and you haven't got to oblige them by your service to them. Otherwise, you are bound to give them obeisances for their beneficial contribution.
So devotional service is rarely achieved. Rarely achieved means if you achieve, then you become free from all obligation. Na janma-koṭibhiḥ sukṛtibhiḥ. Tatra laulyam eka-mūlyaṁ na labhyate yad janmabhiḥ sukṛtibhiḥ (CC Madhya 8.70). Kṛṣṇa consciousness can be achieved simply by your intense desire that, "This life I shall try to achieve favor of Kṛṣṇa." Kṛṣṇa will help you. Teṣāṁ satata-yuktānāṁ bhajatāṁ prīti-pūrvakam, buddhi-yogaṁ dadāmi tam (BG 10.10). If you are actually seriously engaged in Kṛṣṇa consciousness, then Kṛṣṇa gives us intelligence how to approach Him.
So pure devotional service is rarely achieved. But by chance, guru-kṛṣṇa-kṛpāya pāya bhakti-latā-bīja (CC Madhya 19.151), if we somehow or other come in contact with bona fide guru and Kṛṣṇa . . . Kṛṣṇa is already there. We are already in touch. And if we are serious, then by grace of Kṛṣṇa, we get niṣkiñcana, devotee, and by his grace we achieve to the platform of devotional service. Otherwise it is very difficult. Not by executing karma, jñāna, yoga. No. Bhaktyā mām abhijānāti (BG 18.55). Simply you have to take pure devotional service.
Therefore it is very difficult. People do not wish to come to the pure devotional service. They want hodgepodge: something this, something that, something that. No. Sarva-dharmān parityajya mām ekam . . . (BG 18.66). That is the beginning of pure devotional service. No other engagement. Simply Kṛṣṇa. That is pure devotional service. But that is very difficult to achieve.
People will not accept the simple thing. You give them big, big formulas, yoga system, aṣṭāṅga-yoga, they'll like it, "It is something." Just like in homeopathic medicine, because it has no taste, there is no trouble to drink, people do not believe in it. But if you give them some very bitter, pungent medicine, "Oh, it is something."