But the flat Earth is really only a tiny sphere whirling through space. The solid ground beneath our feet is really a seething soup of energies and virtual particles. What ever things seem like to common sense has to be wrong, or at least a very inadequate picture of what reality actually is. So it must be with time. The simple linear progression of future, present and past cannot be the whole truth.
Relativity shows that time and space are interrelated.
In the Feynman diagram anti-particles are particles going backwards through time. At its fringes human experience seems to be able to climb out of time. There are well attested cases of precognitive vision. Mystics of all religions have claimed to have moved out of time into eternity. The answer has to be that he probably has not.