What proof can possibly be offered? The miracle of life? The ability of a plant to perform photosynthesis? The existence of the oceans? The way that the moon controls the tides? The way that a bee pollinates a flower?
These are all miracles, and they occur every day. That's the only proof I require to believe.
Devil's advocate for a second: A scientist would say that these are all naturally occurring events and someone else might say that we perceive these as a miracle only because we're at the tail-end of the natural process called evolution.
