Intellectual knowledge exists in and of the brain. Because the brain is part of the body, which must one day expire, this collection of facts, however large and impressive, will expire as well. {But spiritual insight transcends death.}
When good thing are accomplished, it does not claim (or name) them. This is Te, which is close in meaning to power or virtue. It is something within a person, and it is enhanced by following the Tao, or 'that from which nothing can deviate'.
The fourth (of the four cardinal virtues) is supportiveness: this manifests as service to others without expectation of reward. (Paraphrased: Such service is not a mere conforming to some external rule of behavior, but instead a manifestation of your original nature).
My teachings are easy to understand and easy to put into practice. Yet your intellect will never grasp them, and if you try to practice them, you'll fail. My teachings are older than the world. How can you grasp their meaning? If you want to know me, look inside your heart.