At this time, dimensions are defined. Time is defined. Therefore, we exist and can discuss these things. Science cannot and will not address the situation prior.

I don't care if religious people want to speculate about it, but the scientific view would be that no discussion was possible about a universe totally undefined, without time or dimensions.

It's possible to be in conflict with science. For example, suppose a person claimed that green rabbits ruled the Universe before the beginning of time. The scientist would reply, no, that's contrary to Undefined. That's impossible. The green rabbits could only exist after the beginning of time and space.

Keep in mind that historical concepts of infinite, finite, forever, eternal and so forth, should not be expected to be as precise as modern words. That's okay, really. They did a pretty darn good job with what they had.