This all depends on how one looks at time, technically. Someone will probably explain it, I don't have the energy right now.
Go watch a documentary on time travel or something Also, watching a few that deals the universe and space time helps.
Besides, we don't see the full extent of the picture, given the fact that we only exist in three or four dimensions out of eleven total that exists within Space-Time.
Mightier than the tread of marching armies is the power of an idea whose time has come