The comos is perfectly causal ( i.e. it's 4-D );
so it never changes and nothing “ came first ” ( i.e. nothing's 3-D ).

From ignorance comes the notion of “ randomness ” ( sub 3-D )
and the sensation that something “ came first ” ( 3-D ).
Semi-Randomness is just semi-ignorance.

Louis de Broglie showed that the wavelength of anything,
including the earth and your body, is:
Planck's constant over momentum.

Quoting WikiPedia:
“ Whether objects heavier than the Planck mass
( about the weight of a large bacterium )
have a de Broglie wavelength is theoretically unclear
and experimentally unreachable;

above the Planck mass a particle's Compton wavelength would be
smaller than the Planck length and its own Schwarzschild radius,
a scale at which current theories of physics may break down
or need to be replaced by more general ones. ”.