Similarly, we are a small fragmental portion of God. God is suppose the lump of gold, and we are a little particle of gold. So although we are little particle, by quality we are gold. God is gold; we are gold.
So if you can understand your position, then you can understand God also. Just like from a bag of rice you take a few grains and see, then you can understand what is the quality of rice in the bag and you can evaluate it, price. So if you try to understand yourself, then you can understand what is God. Or other way: if you understand God, then you understand everything. One way is ascending process, one process is descending process.
Just like on the roof there is some sound. Now we are here, we are not on the roof, we may conjecture or theorize what is that sound. Somebody will say some cat must be there; somebody will say that some man must be there. In this way, we can go on, speculate. This is also one process. This is called ascending process. And descending process means if there is one person on the roof, he says: "This sound is due to this," then that is also perfect knowledge. So we get knowledge from the higher authorities, that is perfect knowledge, and that is easier.
So if you study yourself, "What I am? Am I this body? I am this hand? I am this finger? I am this hair?" go on studying, one day it will . . . you will come to the point of understanding, but it will take many, many years. But if you take from the authority, just like Kṛṣṇa says that the living force within the body, that living force is changing from one type of body to another.
Just in our life experience, every one of us knows that I was a child, I was a boy. Just like I am an old man. I remember when I was playing on the lap of my elder sister, I remember still, and my body at that time six months old. But I still remember my elder sister, she was nine years older than me, and I was playing on her lap and she was knitting.