There is plenty in the Bible that is not truly comprehensible to the mind of Man. There are many examples. We can't fathom how God can be three yet be one at the same time. Also, we can't fathom how Jesus can be truly Man and yet truly God at the same time.
Nowhere in the Bible does it explicitly and simply state that God is a Trinity. Yet this is something that we understand through the teaching of the Church. There are clues and pieces that when studied and interpreted correctly, lead the conclusion that God is a Trinity.
So why do you insist that the story of the 7 days of creation and the story of Adam and Eve must be take on the most simplistic, face-value, and absolute literal level?