Let The Redeemed of The Lord Say So
Just as it was with Jonah when he eventually went to Nineveh, it is the word of our testimony that changes lives.
Your testimony is powerful and personal, no one can argue with your story and how it changed your life. Most will be intrigued and hear you out. Some will even be helped by your story if they are going through something similar.
"Let the redeemed of the LORD tell their story--those he redeemed from the hand of the foe.."