This verse from the Bhagavad Gita emphasizes the importance and power of knowledge. Lord Krishna tells Arjuna that nothing in this world can purify a person as effectively as knowledge does. By knowledge, it means understanding the true nature of things, gaining wisdom, and realizing the essence of life.

Krishna further explains that a person who has perfected the practice of yoga will naturally attain this knowledge within themselves over time. Yoga here refers not only to physical exercises but also to the path of spiritual discipline and self-realization. Through the practice of yoga, which includes meditation, self-discipline, and devotion, one can gradually attain spiritual enlightenment and understanding.

This verse teaches us that true purification and spiritual growth come from acquiring knowledge and wisdom, and by following the path of yoga, one can gradually attain this knowledge and find inner peace and fulfillment.