In plain words
All the lights of life shine by the Supreme Light alone. To teach the people this inner meaning, today, on Dīpāvali day, lighting lamps from one lamp has been shaped into a symbol for remembering that oneness. Not one festival has gone without an inner meaning of its own. But we forget the power of the festival and, spending festival days on nothing but pāyasam and sweet rice, we make our life meaningless.
The festivals of the people of Bhārata are not meaningless. They are full of the Ātma. They are full of Ānanda. Because there is no one to explain them, and because those who understand them rightly are few, we are sinking in these evils. Today is the slaying of Narakāsura. With whose help did He kill Narakāsura? Satyabhāmā. Satya means truth. Taking this Satya as our support, believing Satya itself to be the very form of the Paramātma, we must through it slay the demonic nature in us. Satyameva jayate. That alone wins. That is why the Veda has satyaṃ vada: Satya must be spoken. And what did the Purāṇas say? That we must put this Satya into practice and live out our life in Ānanda. Once, they say, Bhūdevī went to Viṣṇu and grieved greatly. ‘O great Lord! However wicked people may be, I can bear them; but one who speaks Asatya I cannot bear,’ she said, so the story goes. It is because this Asatya is there that everything in humanness is turning into falsehood. For the sake of Satya, Hariścandra lost his wife and children and became no more than a keeper of the cremation ground. He dedicated his life to Satya. Satya is beyond place, time and person.
One may catch the thunderbolt of the deluge in one's palm, one may lift the golden mountain on a fingertip, one may join the two, heaven and earth; but no one on earth can make Hariścandra lie.
The reason the principle of Hariścandra still stands fruitful in the world today is Satya alone.