Without a direct revelation from God it's impossible to know for sure, but circumstances might suggest the possibility that we have indeed experienced a special visitation. I have two such experiences.
For a quarter century, Abraham and Sarah occupied God’s waiting room. When Abraham was 75 and his wife 65, God promised they would have a son. At just the right time in God’s providential plan, Abraham and Sarah laid eyes on the promised child and heard the words they had dreamed of all their lives.
When God forgives, He casts our sins as far as the east is from the west. He remembers them no more! However, Abraham’s life reveals another sobering truth: God’s merciful decision to not hold our wrongs against us doesn’t mean we won’t suffer physical, social, and emotional consequences in the present world.