Perhaps the human brain is deliberately limited so as not to enter into these things, which are of the divine order.
Discussion
Not deliberately, but the human brain is highly influenced by what it sees, consumes, hears, speaks or touches; once you develop spiritual discipline with Peers, the Universe and God, you will filter out the noise and start working in a different frequency - you have to accept the miracles of God and His creation - immortality is the Universal way of life, how you choose to live your life NOW is what matters.