Is there anybody wise enough to say whether there is a God or not?

You don’t have to be wise to understand that God exists. Who God is, however,must be revealed to us by a wise person. A wise person is someone who knows the difference between spirit and matter, who knows the difference between the self, and the body and mind.

Consciousness is the symptom of the soul. Whenever we see a living entity we should identify a soul rather than a body.

People usually identify themselves with the body and its culture, and that false identification of oneself is due to ignorance of the real self, the soul. So our real identity is as souls, and in Bhagavad Gita, God offers a brilliant argument to help us realize our identity as souls, different from the body and mind.

Krishna says:

As the embodied soul continuously passes, in this body, from boyhood to youth to old age, the soul similarly passes into another body at death. A sober person is not bewildered by such a change. (Bg. 2.13)

What God says here, is that the body changes from childhood, to youth, to old age. But the self, or the ‘I’ within, remains the same. One's mind and intelligence change, certainly. One's thoughts, feelings and convictions change as time progresses. But it is the same inner observer who experiences these changes. The I-feeling remains constant.

So, despite the alterations of matter in the body and mind, we remain the same inner observer. And that is the eternal soul.

It is the same person, or soul, who sits in a child's body, as the one sitting in the old man's body. The person didn't change, in the sense that he remains the same observer.

His thoughts and feelings and intelligence change, but it is the same self who experiences those changes. In this way anyone can experience their own real self.

The soul, or the self, belongs to God’s marginal energy. That the soul is marginal, means it will be controlled by either spirit or matter. It will be controlled by God, or it will be controlled by nature.

The choice we have is whether we want to be controlled by matter, or by God.

When one's choice is motivated by a desire to become free from the false ego, free from bodily identification, when we cultivate genuine desire to know God, then Krishna takes control of our lives, and we begin our spiritual journey back home, back to Godhead.

As long as we think we can become happy in a material body, we are in illusion, and the minute we realize we are not this body, and that the happiness of the body is ephemeral and without substance, we can achieve real happiness - the happiness of the soul.

Krishna says:

A person who is not disturbed by the incessant flow of desires -- that enter like rivers into the ocean, which is ever being filled but is always still -- can alone achieve peace, and not the man who strives to satisfy such desires. —Bg 2.70