Kṛṣṇa glorifies knowledge as the ultimate sanctifier. He declares that in this world, there is nothing as sublime and pure as transcendental knowledge. Rituals can wash the skin, and disciplines can wash the mind, but only knowledge can wash the soul of its core illusion. He adds that this knowledge is the ‘mature fruit’ of all spiritual practice. One doesn’t get it instantly just by reading a book. One must become ‘yoga-saṁsiddhaḥ’—perfected in the practice of devotion and service. When the time is right (‘kālena’), this knowledge manifests automatically within the heart of the sincere practitioner. You cannot force a fruit to ripen; you simply water the root and wait. Similarly, you cannot force enlightenment, but you can create the conditions for it through service. Kṛṣṇa is telling Arjuna to be patient and committed. The clarity he seeks will come as a natural blossoming of his ongoing devotion and work.