Do you have to see your guardian angel in order to believe he exists?
No. We can believe because Jesus told us that we all have guardian angels.
“Just like air, God is there!” We don’t see air, but we know it exists because we can feel its effects. In a similar way, we can feel our guardian angel when we are protected in a miraculous way or when an idea or reminder comes into our mind at exactly the right moment to help us.