The lot of the jivas , is to seek laukika sukham, as the 'state of oneself' being 'sukham' is what is desired.
This desire takes various forms, covered under artha, kAma and also under dharma.
Artha is the desire for security, security of the body, and security to conduct ones life with adequate health, financial security to maintain oneself.
Under kama comes what we call as luxuries, and something greater than the necessities. While food, clothing, shelter , come under artha, or necessities, anything more than that comes under kAma or luxuries.
In modern times we are seeing the trend, wherein more and more luxuries are getting converted to necessities, hence life is becoming more and more complex.
The next means to happiness is dharma, a human being is generally not satisfied, especially after a certain degree of maturity, a person wants more than just luxuries and security. We want punya, to do good for others, to contribute to the society, to be a righteous person. These are also desires that bring sukham or happiness, both from the satisfaction of performing these actions, and also from the punya gained as a result of these 'reaching out' activities.
There is also, for the believers in the vedas, various yajnas, karmas are available, that can gaurantee, sukham in other lokas, after passing away of this body, one can desire for svarga and so on, that is another form of desire , for sukham by earning punya.
The common denominator in all these kinds of sukham, is that all these are not nitya sukham, rather they are anitya sukham. Anitya means they are necessarily time bound.
Even for a person who has acquired a great deal of punya, he can go up to svargaloka, and in svarga it is mere spending of punya, until the punya is exhausted, the person again has to be born as a human being , wherein there is the possibility of performing further karmas.
What one seeks all through , in all ones activities and en-devours is a permanent sukham, which appears is not available in the activities and the material gained from the lokas ( be it this , or a higehr loka) , referred to as laukika sukham.
The vedas which initially in the karma kanda, give the means to achieve sukham ends that are anitya, such as svarga and so on, in the later part, known as jnana kanda, give the means to achieve the nitya sukham or permanent sukham.
The means to permanent sukham is presented not as a material, to be gained. This is indeed logical, since no material by itself is something that can contain happiness as its nature.
If one observes in ones own life, the very same acquisition can be both a source of happiness as well as sorrow for different people, and even for the very same person, what is a source of happiness today, the same thing may become a cause for sorrow tomorrow. Whatever is in this world is impermanent, and even its capability to bring happiness is impermanent.
Therefore the happiness that the acquisition brings cannot be construed as a 'property' or 'attribute' that belongs to the material or acquisition, rather the happiness is experienced within oneself.
It is oneself that one finds to be 'happy' , when temporarily the 'wanting person' subsides, a desire is fulfilled, I see 'myself as fulfilled'.
It is this 'seeing myself as fulfilled', 'seeing myself as whole', ' seeing myself as devoid of limitations', this is what we call as 'happiness' or sukham.
This being the case, the shAstra presents the means to permanent sukham, nitya sukham, not as another acquisition, which as we saw , no acquisition can be permanent, neither reliable, neither a source of happiness by itself.
Rather shAstra present nitya sukham, as the reality of oneself, as the very truth about oneself.
Shastra or the vedas, proclaim the cause of sorrow to be very different, and unlike from what we might imagine. This condition of repeated travails and the roller coaster experience of cyclical waves of sorrow and happiness, the shAstra calls as 'samsara', and this condition is purely said to be a product of ignorance.
In truth, says the shAstra, in reality, the atma or the self, is whole, pristine, pure, not subject to birth or death or change, of the very nature of limitlessness or fullness, which is what one experiences as 'the happy self' even in instances when the wanting person subsides for the time being.
ShAstra goes into the very cause of 'why the person finds himself to be wanting'. To answer this question the shAstra points out a beginingless ignorance, due to which the person, the being , atma who is by very nature itself, of the nature of fullness and completeness, identifies with a 'projected' limitation of the body mind. We clearly see that the body mind is full of limitations, and hence are unable to accept ourself, as one subject to limitations.
This refusal to accept oneself as subject to limitations, as well as the fact that we do see ourself as 'whole' and 'not wanting' often, on even hearing something as simple as a joke, does prove that, the contention made by the shAstra, about ourselves being 'of the nature of fullness' and the possibility of their being an ignorance, and the possibility of commiting a mistake in terms of ones own understanding of oneself, as a something that we cannot completely dismiss.
Since the shAstra offers a solution, and we are indeed wanting what the shAstra offers via a solution to ignorance i.e the fulfilled self, a permanently fulfilled self, we have no choice but to consider this solution, and give it a hearing, a chance.
Giving it a chance, means we need to have trust, a trust pending understanding, this is called an attitude of trust. So we buy the possibility of us being ignorant about our true self, and look for knowledge as a solution, as any ignorance is obviously countered by knowledge alone.
ShAstra hence offers the means to nitya sukham, via atma jnanam or self knowledge.
We need not only the shAstra, but also a guide, who knows how to decipher and communicate the teaching of the shAstra. There also happens to be a methodology of teaching the shAstra and giving the knowledge that removes this ignorance. Hence the shAstra comes not alone, but comes along with a guru, from a valid parampara, a teaching parampara or lineage.
We say that the vedas are beginingless , as beginingless as the universe, and so is the guru. We consider ishvara, himself, who manifested as the vedas alongside the universe, as also the very first guru, and this guru parampara, we say is still alive today, as shankaracharya, adi shankaracharya is available to us as the in between link, to this teaching tradition.
Thereby in order to gain this 'nitya sukham' that we all seek, we have an attitude of trust pending understanding, in the shAstra, the guru and the guru parampara, and ishvara who is guiding us all through this means to remove ignorance, and reveal oneself as wholeness.
This 'trust pending understanding' means that we make the guru-shastra as the principal center of our lives, and we tweak our lifestyle, or goals and attitudes to make it conducive towards gaining this knowledge.
The bhagavad gita says that this knowledge is not just available to renunciates or sanyasins, but it is equally available to grhstAs or householders as well. In the bhagavad gita itself, which itself is a means to this self knowledge, both the teacher lord krsna and the student arjuna, are householders and in fact kshatriyas who are always in the very thick of action.
If it is available even in the midst of such happening battlescene of the mahabharatha, it can certainly be available to us in our daily lives , where all we do is go to office, and build some software or do some accounts.
It is upto our own free will, and the intelligent use of our free will, to first identify the problem, see the shAstra and guru as a possible in fact a probable means to solve this problem, and finally gain the complete confidence trust, and of course the very knowledge that validates the trust and makes it more real than anything else.
This is what we are all born, as humans for.