In plain words
Upa-ni-ṣad. Upa means near. Ni means below. Ṣat means sit. That is, its meaning is that you must follow the guru and the elders humbly. However far you think God is from you, that far away He is. However near you feel God is, that near He is. For this far and near the fault lies in your feeling alone; God is neither far nor near; He is everywhere. He is the atom within the atom and the vast within the vast. That is why: Aṇor aṇīyān mahato mahīyān. When every human being sets out to inquire into this divine principle, researching, reflecting, and inquiring into it with śraddhā and Bhakti, you will surely understand it. But man today makes no effort at all to know it. People are dedicating their all to the affairs of the world, which are transient, impermanent and untrue. But man is not dedicating even an atom of his time to the eternal, true, divine path. This is the lack of śraddhā that has come over man. Śraddhāvān labhate jñānaṃ. Only to one who has śraddhā does Jñāna come. Without śraddhā we cannot experience even what is very near us.
Man makes no fitting effort to recognise what the root cause of his unrest is. Though Nārada, the mind-born son of Brahmā, was perfect in all the arts and a master of all the śāstras, unrest went on welling up in him from time to time. He went to Sanatkumāra to recognise the cause of this unrest. He prayed, "Sanatkumāra! Teach me the cause of my unrest, root it out, and grant me fitting Jñāna." Then Sanatkumāra questions Nārada. "Nārada! What is your qualification? What have you studied? What fitness do you have?" he asked.
The sixty-four branches of learning this very Nārada mastered grandly, yet he could not find unbroken Śānti nor attain the supreme Ānanda!