God's will.....who needs it?

[Purple Rabbit]

Then what about the Casimir-effect which shows that the spontaneaous creation of matter out of nothing is all over the place and can be measured?

No, it does not show the spontaneaous creation of matter out of nothing. "According to present-day understanding of what is called the vacuum state or the quantum vacuum, it is 'by no means a simple empty space'; and again, 'it is a mistake to think of any physical vacuum as some absolutely empty void.' According to quantum mechanics, the vacuum state is not truly empty but instead contains fleeting electromagnetic waves and particles that pop into and out of existence" (Vacuum state). "It is therefore believed that the vacuum energy is 'real' in the same sense that more familiar conceptual objects such as electrons, magnetic fields, etc., are real" (Vacuum energy). Ergo, not ex nihilo.

You mix things up. What you describe as "fleeting electromagnetic waves and particles that pop into and out of existence" IS the phenomenon itself. Please be careful what you quote from who, this is specialized area and there is a lot of quantum flapdoodle around. These particles and waves (in QM there is duality, particle and wave are two sides of a coin, the enumeration really makes no sense) are created at random due to the Heisenberg Uncertainty principle. This is 20th century quantum mechanics. The vacuum can not have exactly zero energy. The only way to get around 'ex nihilo' is to observe that space itself is not the same as nothing. So there, I've given it away for free, because I'm in such a good mood today. But things do get created from empty space.