Verse - I Isopanishad

 ॐ ईशा वास्यमिदँ सर्वं यत्किञ्च जगत्यां जगत् ।
तेन त्यक्तेन भुञ्जीथा मा गृधः कस्यस्विद्धनम् ॥१॥
om isa vasyamidam sarvam yatkincha jagatyam jagat ।
tena tyaktena bhunjitha ma grdhah kasyasviddhanam ॥ 1॥
Om. All this whatsoever moves on the earth- should be covered by "Isa" the Lord. Protect (your Self) through that detachment. Do not covet anybody's wealth(do not covet- for whose is wealth?)

One who lords over (has the power) is ‘Isa’. He who regulates controls, rules is the supreme Ruler and is supreme Self of all is the Lord. Since He is the indwelling soul of all and He is the self of all hence rules all. So (Isa) by that Lord in His real form as the Self, everything should be covered (vasyam); whatever that moves (jagat) on the earth (jagatyam).

(Whatever we see in this world is moving; for moving means there is a birth to it, it stays, it grows, it reaches its culmination point, it decays and lastly it falls in the hand of death or it stops to exist in the form that we witnessed it to be.)

So all these is to be covered by one’s own Self, by the Lord, through his supreme reality(present in the realisation) as because He is the indwelling Self of all and “I am all this”; all this that is unreal ; whatever is ‘Jagat’(moving) ,i.e. whatever is not real to be covered by one’s own supreme Self.

Whatever moves means the apparent duality, the effect of ignorance; characterising ideas such as agentship, enjoiership,etc;  which is superimposed on the real nature of the Self.

Bhagavan spoke to us about Vedanta in such a lively pattern that more often we in our day to day life did find these words of Upanishads very practically true. One such instance is that while I was adolescent I went to see a movie in a cinema-hall and watching the movie and all the time I was in search to see the Screen, on which the movie is being projected. Because the other day Bhagavan narrated me the vedantic thought how everything that we experience is false, by giving the example of a movie; that it is no matter how brilliant the heroine is dancing on the screen or how violent the scene is, fire is there altogether fountain is there as well but in reality that heroine was never there nor those violence nor even the hero or the fire or the fountain, all the while there was screen, and we thought there was all those movement!  The whole experience of emotion or drama or action is but falsity.

In this same way all this doership, agentship, enjoiership and everything else are falsity. Only truth is the real Absolute Being, the Self. That’s why the Upanishad asks us to cover everything with the supreme Self. Every type of modifications such as doership or enjoiership or everything else any name, form or action will be abandoned through the contemplation of the Self, which is the Truth Absolute.

He, who thus has fully immersed in the thought of Self or supreme Being has only competence for renouncing (tena tyaktena) three kinds of desire; desire for son, desire for wealth and desire for the world after and hence not for karma (action).

Since one is totally engaged in the thought of the Self as God so to him this mundane world is already lost and he therefore is detached from this world. Through that detachment and not by any abandoned thing one should protect one. So through renunciation one should protect (bhunjithah).

But protect what? When one realises the Supreme he should keep his mind fixed in that, till the mind vanishes and one becomes the Bramhan Itself. Because with great luck we get the opportunity of a human birth and the realisation of the oneness with the Absolute Self is the main purport of the scriptures and the goal of human being.  So one should protect it till he Becomes.

And those who have thus renounced desires, (ma gridha) do not covet; do not cherish any desire for wealth. Do not long for either your or anyone else’s wealth (kasya svid dhanam). The Upanishad here uttered in this way that- whose is wealth? Putting the question in denial Upanishad is asking not to cherish, because nobody has any wealth which can be coveted. Cover everything by Lord; all this is but the Self, everything belongs to Self and the Self is all. So do not cherish, do not covet.

Thus 1^st verse says, the main purport is to protect the Self with firm devotion to the knowledge of the Self after renouncing the three fold desire for sons etc.