Aquinas's Fifth Way

[Mudhammam]

Natural science already takes causality as a given. The problem lies at a higher level of inquiry, mainly metaphysical (or as you say theological). Speculations and assumptions are not grounded by reason, which is the main tool of philosophy.

"'God is, or He is not.' But to which side shall we incline? Reason can decide nothing here."

Pascal almost had it right. He can be forgiven of ignorance due to the age in which he lived, but modern man knows better than to believe in the ability of his unbridled imagination to forgo a quintessentially empirical endeavor by attempting to solve a question, with ad hoc assertions, that is itself not even vaguely understood.