If I am highly educated, if I have got good knowledge, if I am great philosopher, scientist—everything—if I do not engage all these qualifications to Kṛṣṇa's service, then I shall naturally become falsely proud, and that is the cause of my falldown. I will never be able to approach God, because I am not humble and meek."
But as soon as one engages these qualifications for Kṛṣṇa's service . . . the scientist, he can present so many scientific thesis to prove that there is God. That is his perfection of scientific knowledge. If a philosopher writes article to convince man that Kṛṣṇa is the Supreme Personality of Godhead by philosophical thesis . . .
Because there are men who want to understand the Absolute Truth through philosophy, through science, so it is the duty of those who are scientifically advanced, philosophically advanced or materially advanced or wealthy, they should engage all this for Kṛṣṇa's service.
Because we have to engage ourself. Devotee means prāṇair arthair dhiyā vācā (SB 10.22.35).
Life, wealth—prāṇa means life. Wealth . . . artha means wealth. Prāṇa artha dhiyā—intelligence, prāṇa artha dhiyā vācā, and words. If one has no money, no intelligence, he can use his words. He can go to the people, and he can say: "Please chant Hare Kṛṣṇa." He can do.