In order to understand anything, you must be on at least the same level as what your are attempting to stand beneath. They may sound reasonable and may even provide a modicum of comfort, but in the end only Reality rules. Some scientists actually believe both theories and some, neither. Only a few scientists have experienced Reality. It is unchanging.
Most humans live from their heart down.
A few from the heart up. The heart is the only area these two have in common. There are seven areas of consciousness in the human body - the heart is the center one, the fourth. But when he says 'I know,' and truly means it, you have found an evolved person. We started at the bottom and are working our way up.