There is no such thing as "a universe from nothing". Time itself is a function of the universe, as well known since Einstein's time. If the Big Bang theory holds, time starts "immediately" after it. Postulating anything "before" is as meaningless as dividing 1 by 0 (what mathematicians call a "singularity").

Spiritual ideas must be considered somewhat detached from physical time. "Eternal life" is such a concept.