The idea that science (ie, rationality) can explain the world is, unfortunately, paradoxically contradictory, as Bertrand Russell demonstrated with his paradox in 1901.
Science is merely a versatile tool to help us manage the world. It can’t explain the world.
Instead, Russell’s paradox means that every explanation of the world is paradoxically contradictory.
Our choice is thus not between what we shall believe in, but rather between whether we shall believe or not.