In plain words
Hanumān burnt all of Laṅkā, and though at midnight these flames made the whole city of Laṅkā look like broad daylight, in Rāvaṇa's heart it stayed dark. What was the reason? Because evil deeds, evil qualities and evil feelings lay hidden in his heart, not the least light could be seen in him. That is why every man must show his nature to be sacred, spotless, selfless and pure.
An outer lamp needs four things. First, the clay lamp. Second, the oil. Third, the wick. Fourth, the matchbox. If any one of these four is missing, we cannot light the lamp. In the same way, four things are needed to light the inner lamp too. For it, Vairāgya is the clay lamp. Bhakti is the oil. One-pointedness of mind is its wick. Knowledge of the principle is the matchbox. If any one of these four is missing, if any one power is lost, we cannot light the lamp of the Ātma. The Praśānti within unrest, the prakānti within Praśānti, the paraṃjyoti within prakānti: that paraṃjyoti is the very form of the Paramātma. So where is this principle of the Paramātma? It is in unrest itself. It is in ignorance itself. This ignorance is not a separate thing. It is only the absence of knowledge. Darkness is only the absence of light. To recognise the oneness in both and to live by it is man's chief duty.
But though we are men endowed with such intelligence, we are not able to use it in the right way. All creatures that know no learning, beasts and birds too, go on living without breaking their own law. But man, who has intelligence, lacks this sense. Born as human beings, experiencing divinity and yet forgetting the Divine, we are wasting our humanness. Among all creatures, a human birth is hard to win. It has the fitness to attain the principle of Brahman. It has the knowledge that discerns the eternal from the passing. He is a knower who can think about our past, present and future too. With so many fine qualities, if man behaves worse than the qualities of beasts and birds, who are lower than he is, is this true humanness? Even in beasts and birds one can see a goal, a reason, some kind of duty. But in this humanity no season and no reason can be seen. We must reshape such a humanity today and proclaim to the world an ideal way of life. Ours is the human race. All are children of God. All are equal, as brothers. We must keep this truth in mind always. So when will Vairāgya come to us?
Wherever we look in this world, there is fear. Wherever we look, there is hardship of one kind or another.