Sin entered the world through the actions of a woman.
When the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of its fruit and ate, and she also gave some to her husband who was with her, and he ate.
God used a woman to bring the Redeemer into the world to atone for sin.
Now the birth of Jesus Christ took place in this way. When his mother Mary had been betrothed to Joseph, before they came together she was found to be with child from the Holy Spirit. And her husband Joseph, being a just man and unwilling to put her to shame, resolved to divorce her quietly. But as he considered these things, behold, an angel of the Lord appeared to him in a dream, saying, “Joseph, son of David, do not fear to take Mary as your wife, for that which is conceived in her is from the Holy Spirit. She will bear a son, and you shall call his name Jesus, for he will save his people from their sins.”
Recently two former popes have been canonized as saints by the Catholic church. According to the book Saints for Dummies these are the requirements a person must meet before before being considered a saint by the church.
To become canonized as a saint, a perfect track record isn’t required (or possible). Hence, being sinless isn’t on the list. So, what is required for sainthood?
Two verifiable postmortem miracles.
Evidence of having led an exemplary life of goodness and virtue worthy of imitation, having died a heroic death (martyrdom), or having undergone a major conversion of heart where a previous immoral life is abandoned and replaced by one of outstanding holiness.