In plain words
They make no effort to turn the intellect inward and through it to recognise the Ātma. For animals the outward gaze is natural: what marks out human beings is this inward gaze. In man the outward gaze does harm. Not to scramble for food, but to develop the intellect that seeks the Ātma: that itself is the goal of human life.
However much learning you gain, however much strength you have, however many offices of power you win, through your conduct you must strive eagerly for Vijñāna, Prajñāna and Sujñāna. To be without these is a disgrace to personhood itself.
If you think life is only for food and pleasure, there was no need to be born human. Dogs and jackals fulfil that purpose! ‘The one who seeks food is a sinner; the one who seeks the Ātma is a gopī’: so it is said in the Bhāgavata too, of the gopikās.
The supreme aim of spiritual discipline is precisely to release the citta's movements, kāma and krodha, from the pitch darkness. Through kāma, men forget Rāma. Krodha itself goes with kāma, as its companion and its twin! These two turn man into a demon. Like fire covered by smoke, kāma lies hidden in the citta. The thirst of kāma has no end.