Prabhupāda: There is nothing material before Kṛṣṇa. Because everything's coming from Kṛṣṇa. One who does not know Kṛṣṇa, it is material. One who knows Kṛṣṇa, it is spiritual. Hm.
Puṣṭa-kṛṣṇa: "O best amongst the twice-born, it is therefore concluded that the highest perfection one can achieve by discharging his prescribed duties, dharma, according to caste divisions and order of life, is to please the Lord Hari."
Prabhupāda: That's it. You may be scientist, you may be something else, but if you try to satisfy the Supreme Lord by your occupation, that is perfection. That is perfection.