"Be careful in dealing with a man who cares nothing for comfort or promotion, but is simply determined to do what he believes to be right. He is a dangerous uncomfortable enemy, because his body, which you can always conquer, gives you little purchase upon his soul."

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The difference between a stranger sending you a message that you might be interested in at a very low volume level, no repetition, just sending it to very few people, and that being done as spam - those things get close enough that you want to be careful never to filter out something that's legitimate.

— Bill Gates