Allowing a cocain addicted adulterer to ever effect ones faith is a sad state for any human
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Allowing anything but the work of the Holy Spirit to ever effect ones faith is a sad state for any human.
A recipe for failure.
Imagine if Freud had been tempted by free unlimited internet porn. We'd never have heard of him.
People said similar things in my critique of Stephen Hawking. I tend to look at the content of what people say moreso than their personal lives. Not that I don't think low moral character has any affect on the value of their ideas, I just tend to be uninterested in what they were like personally while researching.
The notable exception is Thomas Jefferson, of course. People have shown me his anti-Christian or pro-democracy quotes, and I respond: "This clown knocked up his slave girl! Who cares what he thinks?"