As Bhagavad Gita says, out of many human beings, one tries to achieve perfection of life.
Man is an animal, but compared to animals, humans have a special prerogative: reasoning power. But animals also have reasoning power. For example, a cat wants to steal some milk from the kitchen. It is clever. It waits until there is no one around, then it steals.
So, what's that special reasoning power in humans? That is to inquire, "Why am I suffering?" Animals are also suffering, but they don't have this special reasoning power to inquire.
Why are many human beings compared to animals? Because they don't know anything beyond bodily necessities—eating, sleeping, mating...
The Bhagavad Gita says that out of many people, one develops the reasoning power to question, "Why am I suffering?" By good association (Krsna consciousness), one's special reasoning power awakens. When these questions arise, gradually one comes to God and lies on the path of perfection, and the question of one's relationship with God arises. That is the final perfection of life.
The easiest method for self-realization is chanting the Hare Krsna Mahamantra. If we want to understand Krsna, that's the beginning.
They are arranged in ascending order of fineness, or from gross to subtle, so that Earth is less subtle than Water, Water is less subtle than Fire, and so on.
Beyond intelligence, the soul is finer, but science stops at intelligence (studying the mind—psychology and psychiatry). For intelligence and rationalism, there is only a little philosophical speculation. But what about the soul?
The Bhagavad Gita starts at the point of intelligence, where Arjuna was very confused about whether to fight or not. So Krsna begins from the point where intelligence failed. Knowledge of the soul begins there.
A child grows into a teenager, then an adult. The soul is more than the body. We wear clothes, and after wearing them for some time, they become worn out, old, and torn. Then we buy new clothes and wear them. In the same way, the body changes. When it gets damaged, we simply change it. So after death, the body changes, but the soul remains the same.
It is easy to understand that the last change of the body is death.
The finest material substance is false ego. The body can be seen. The mind can be felt. But false ego is more subtle because it is an identity that we find ourselves in. It is illusory.
I am a pure soul, but thinking that "I am this body," "I am American," or "I am Indian" is Ahamkara. It is not the soul's identity; it is the body's identity.
Ahamkara means the point where the soul touches matter.
Now, Aham Brahmasmi—I am the soul, not matter or the body. But it is the beginning of liberation.
For example, imagine a person suffering from a fever of 100 degrees. He takes medicine, then his temperature goes down to about 98 degrees, but that doesn't mean the person is now completely healthy.
So, just thinking "I am the soul" is not enough. That is not complete liberation. We need to practically understand it.
For example, a person takes intoxication. He forgets bodily existence, but for how long? Two or four hours? It is only temporary.
So, just thinking "I am Brahman" is not enough. You have to engage in Brahman activities.
Fools go to the moon, then to other planets, then to others. They are never satisfied.
So, you don't have to just realize; you need to engage yourself in spiritual activities, thinking, "I am not this matter. I am the soul." Realizing the soul is the beginning of perfection, as mentioned before.
Conclusion: By chanting the Hare Krsna Mahamantra and engaging in Krsna's service, slowly and steadily false identification, or ego, becomes less, the identity of the soul awakens, and one engages in eternal, blissful activities of loving service to God.If you want, I can also make it read more naturally while keeping the philosophy exactly the same.