His is a sincere and authentic testimony, free from sensationalism or self-glorification. Unlike many stories that focus more on human achievement than the glory of God, turning the past into self-promotional propaganda, this one focuses on His great mercies.
Maysa Chagas was an unlikely candidate, as she often describes herself. Yet, God, in His greatness and wisdom, chose the "foolish" things of this world to confound the wise. He chose the "weak" and the "unlikely" to reveal His wisdom and power.