"I more fear what is within me than what comes from without."
Look at the history of Protestantism and you will find Martin Luther looming and lurking somewhere nearby. See where he confronted the corruption of the Roman Catholic Church and faced the challenges of going forward in a faith movement as an enemy of the church.
Imagine the ridicule Martin Luther faced. Think about the humiliation he suffered at the hands of other religious leaders. He was considered a heretic. He was made into an outcast. Nevertheless, he held onto his faith.
Martin Luther was a man just like any other man. Yet, he was a man of deep conviction. He devoured the Scriptures and took them to heart. He allowed the Word to guide him and direct him, even to the point where he abandoned tradition.
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