Jesus Christ who made the affirmative claim was true to His words.
Then like many of us, Philip saith unto Him, Lord, she’s us the Father, and it sufficient us.
But I tell that we are all like Philip today, claiming Trinity, three God’s in one
But see what Jesus Christ said to Philip, Jesus saith unto Him, ( Philip ) Have I been so long time with you and yet hast thou not known Me, Philip? he that hath seen Me hath seen the Father; and how Sayest thou then, Shew us the Father. Please read the whole chapter, ask the Holy Spirit to enlighten you.
We as human beings cannot fathom the working power of God the Holy Spirit. There are unlimited numbers of things that we cannot deceiver in the bible, that is why we have to believe what God says by faith. Like the word of God says, the just live by faith.
The human brain

By Wikimedia.org
Look at our brain, how it works, and do different jobs and have different functions and names, yet one brain in the head.
According to the dictionary, the human brain is the command Center for the human nervous system. It receives input from the sensory organs and sends output to the muscles. The human brain has the same basic structure as other mammal brains, but is larger in relation to the body size than any other brains. The human brain is the largest brain of all vertebrates relative to the body size.
It weighs about 3.3 lbs ( 1.5 kilogram )
The brain makes up about 2 percent of a human’s body weight.
The cerebral makes up 85 percent of the brains weight.
It contains billions nerve cells called neurons or the grey matter
These neurons are connected by trillions of connections, or synapses.
The largest part of the human brain is the Cerberus, which is divided into two hemispheres. Underneath lies the brainstem, and behind that sits the cerebellum. The outermost layer of the cerebrum; is the cerebral cortex, which consist of four lobes: the frontal lobes, the parietal lobes, the temporal lobe and the occipital lobe.
Like all vertebrate brains, the human brain developers from three sections known as the forebrain, midbrain and hinderbrain. Each of these contain fluid-filled cavities called ventricles. The forebrain develops into the Cerberus and underlying structures; the midbrain becomes part of the brainstem; and the hinderbrain gives rise to regions of the brainstem and cerebellum.