The persons who are addicted to speculative knowledge, after many, many births, he comes to the understanding: vāsudevaḥ sarvam iti (BG 7.19), "Vāsudeva, Kṛṣṇa, is everything." That means termination of knowledge. That is jñāna-yoga. If by his research work he tries to understand what is Kṛṣṇa by philosophy or by science or anything, by chemistry, by physics... That is recommended in the Śrīmad-Bhāgavatam:
- ataḥ pumbhir dvija-śreṣṭhā
- varṇāśrama-vibhāgaśaḥ
- svanuṣṭhitasya dharmasya
- saṁsiddhir hari-toṣaṇam
- (SB 1.2.13)
Svanuṣṭhitasya dharmasya saṁsiddhir hari-toṣaṇam. It doesn't matter in whatever activities you are engaged, but if you want to know whether your engagement is leading to perfection, then this is the test of perfection. What is that test of perfection? Saṁsiddhir hari-toṣaṇam (SB 1.2.13). Whether by your work the Supreme Personality of Godhead is satisfied. Just like Arjuna did. Arjuna, in the beginning, he wanted to satisfy himself by not fighting, and he fought to satisfy Kṛṣṇa. That is perfection. Saṁsiddhir hari-toṣaṇam (SB 1.2.13).