So for the speculator, Kṛṣṇa says, bahūnāṁ janmanām ante jñānavān māṁ prapadyate (BG 7.19). 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.