The Kalam cosmological argument:
- Everything that begins to exist must have a cause
- The universe (time) began to exist (13.8 billion years ago)
- The universe (time) has a cause (God)
God created the universe, God created space and time. There are cyclical cosmologies; in them there’s no beginning of time.
A beginningless time also implies a completed infinity, (- \infty, \text{ Now}]; Aristotle declared infinities to be only potential, not complete.
The Axiom of infinity
\exists S : \emptyset \in S \wedge x \in S \implies x \cup \{x \} \in S
A beginningless time is part of certain Hindu/Jain cosmologies. For every point in time T we can ask, what was before T?