There are many powerful arguments for God’s existence, such as St. Thomas Aquinas’ argument from contingency.
Then there are trickier ones, such as invoking our free will to prove that there must be a creator. This explanation can work, but it does have some pitfalls.
Here’s how to frame (and not frame) the argument from free will when you’re debating an atheist.
Don’t act like the existence of God automatically follows from the existence of free will.
For those who don’t accept God’s existence, it’s easy to account for free will by referencing natural causes through biological evolution. It’s a similar mindset to the scientist who — though witnessing the extraordinary order in creation — thinks that natural explanations suffice in lieu of a creator.
Many atheistic philosophers and scientists have written and lectured extensively on how free will could have arisen without divine guidance. Their arguments are faulty, but be wary of debating them without being able to refute these arguments.