Not a Proof
Summary
The First Cause Argument assumes that causes and effects could not possibly go backwards forever, in what is termed an infinite regress - a never ending series going back in time. It assumes that there was a first cause that gave rise to all other things but why?
if we use the analogy, you can always add one number to the highest number infinite times to forever get a bigger number, you can similarly take one number away infinite times to forever get a smaller number, so it is plausible to have causes and effects go on backwards for infinity
Why then shouldn’t the effects and causes extend backwards into the past to infinity?