"Bhagavad-gita" is a very rational book. It immediately tells you what you should change in your life if you want to follow this teaching. It is easy to preach "Bhagavad-gita", it is not difficult to distribute "Bhagavad-gita", but to live "Bhagavad-gita" is not an easy task.
Krisna starts teaching "Bhagavad-gita" only in the second chapter, and the first chapter is very important because it explains the problem which we are dealing with. Therefore first we should understand this problem in our heart before listening to Krisna.
In the first chapter problems of three people are described: Dhritarastra, Duryodhana and Arjuna. They all have the same problem, which we all have, this is fear. Our mind is completely absorbed in matter, therefore fear arises in our heart, we are very afraid of death, and we don’t remember who we truly are.
Dhritarastra, Duryodhana and Arjuna have fear, but only Arjuna asks Krisna to help him solving this problem. All of them are under the influence of three modes of material nature. Dhritarastra is under the influence of tamo-guna, he is stunned. Duryodhana is under the strong influence of rajo-guna, he is solving his problem by diplomatic manner. Arjuna is under the mode of goodness, therefore he is not trying to hide his fear. Krisna spoke "Bhagavad-gita" for those who are sincere enough to admit their weakness of the heart.
The root-cause of all the problems is attachment. This attachment to unnecessary things is the root-cause of all our fears, we are fearful to lose something that we will lose anyway. Krisna does not expect that we immediately surrender to Him completely, we should start somewhere. But by imbibing "Bhagavad-gita", our surrender becomes more and more real.
The first qualification to surrender is that one should be free from pride, become grateful and humble. By achieving this we will be able to conquer over the bad qualities, that we developed due to asat-sanga. Then by being humble and by being free from all these bad qualities, we will be able to concentrate our mind on the spiritual things. And ultimately we will be free from duality of happiness and distress, and will come to the spiritual world.
If we read "Bhagavad-gita" As It Is", we will understand the reality as it is. And the sign that we understood the reality as it is, is that we become humble and are able to admit our own weakness. By doing this we will solve our problems once and forever.