In the present condition, we do not know how Kṛṣṇa will be pleased, but we know from the śāstras . . . we can know also from the direction of the spiritual master how Kṛṣṇa will be pleased. Yasya prasādād bhagavat-prasādaḥ. So Viśvanātha Cakravartī Ṭhākura says you have to follow the direction of the spiritual master. He's guiding as a leader. And if he's pleased, that means Kṛṣṇa is pleased. Yasya prasādād bhagavat-prasādaḥ.
The devotional service is the only way. Karmī, karmī means they are working very hard for their personal benefit, not for Kṛṣṇa's benefit. Similarly, jñānīs, they are also trying for personal benefit, mukti. He wants mukti, liberation, nirbheda-brahmānu-sandhana. And similarly, yogīs also, they want personal benefit, some material power, aṣṭa-siddhi-yoga, aṇimā-laghimā-siddhi.
Bhukti-mukti-siddhi-kāmī sakali aśānta (CC Madhya 19.149). Caitanya-caritāmṛta kar says except pure devotee, who only wants to satisfy Kṛṣṇa, everyone is working for his personal benefit, karmī, jñānī, yogī. But Kṛṣṇa says: "Pure devotional service . . ." Not . . . Rūpa Gosvāmī says: "Pure devotional service is the only means to attract Kṛṣṇa." Hmm. Now . . . but ignorance is no excuse.