Gəck: [T]he only way for existence to.. exist is for it to have always been there.
Duck: ... or for it to have started. The logical process involved, against the idea of creation of the world as we see it, goes as follows:
P1: All perception of light is subjective to the Doppler Effect.
C1: If and only if an emitter of light is moving in a direction opposite to its emission of light, the light will be percieved as redshifted.
C2: For any given viewing point, if emitted light is percieved as redshifted, the emitter is moving away from the viewing point.
C3: If and only if an emitter of light is moving in a direction aligned with its emission of light, the light will be percieved as blueshifted.
C4: For any given viewing point, if emitted light is percieved as blueshifted, the emitter is moving towards the viewing point.
C5: If and only if a viewer is in an expanding universe, most emitted light will be percieved as redshifted.
C6: If most emitted light is percieved as redshifted, the viewer is in an expanding universe.
C7: If and only if a viewer is in a contracting universe, most emitted light will be percieved as blueshifted.
P2: Near emitters of light can be used as references points for highly accurate estimation of average light wavelength from a given emitter.
P3: Such estimations have established that emitted light from far away is, on average, redshifted.
C8: We are in an expanding universe.
P4: If the universe is expanding as time goes forwards, it contracts as time goes backwards.
C9: As time goes backwards, the universe contracts.
P5: We are in an entropic universe.
P6: If entropy increases as time goes forwards, it decreases as time goes backwards.
C10: As time goes backwards, the entropy decreases.
C11: At the beginning of the universe, the universe existed as a single point.
The logical process explaining why science doesn't indulge your curiosities in the regard any further is as follows here:
P7: Any scientific theory that includes information that has not been established as factual cannot be plausible.
P8: We have little to no information established as factual pertaining to the beginning of the universe.
C12: Any scientific theory pertaining to the beginning of the universe includes little to no factual information.
C13: Any scientific theory pertaining to the beginning of the universe including more than little information cannot be plausible.
We simply don't have enough data. However, that doesn't mean science resorts to fantasy to fill in the blanks. When we've done that in the past, it's always turned out wrong.
And yes, I did say that if God was around before the Big Bang, He was most likely killed in the explosion and incinerated.