Mundaka upanishad begins with: “Since the manifold objects of senses are merely emanations of Brahman, to know them in themselves is not enough. Since all the actions of men are but phases of the universal process of creation, action alone is not enough. The sage must distinguish between knowledge and wisdom. Knowledge is of things, acts and relations. But wisdom is of Brahman alone; and, beyond all things, acts, and relations, he abides forever. To become one with him is the only wisdom.”
This reminds us of the wise teachings of Krishna to Arjuna in the Bhagavad Gita.