>>23873
>that which does not exist only begins to exist by something already existing. Therefore, if at one time nothing was in existence, it would have been impossible for anything to have begun to exist;
>But every necessary thing either has its necessity caused by another, or not.

Aquinas may be wrong here. We think that everything must need a cause, and with that axiom everything ends in some primordial and/or absolute being, that may be called god.

But is there are requirement for reason and cause? What prevents something to occur without cause? We have empiric knowledge that this couldn't happen (i.e. we just never seen thing that have no cause), and some shady mathematics that says that conservation law works and you can't get anything from nothing. All these things are made in our universe using our concepts of space and time. But you can't fully describe system while being part of that system. Things outside of the system may have different concepts that allow events to happen without cause, because it is related only for our concept of time that may not exist "outside".

In other words: something may just occur from nothing spontaneously and it is ok, although completely impossible from our point of view.