Board Thread:Speculation House/@comment-27397283-20160215212956

I was just rewatching the series, and I jut watched the part where Ozpin was reassuring Ruby about her leadership of Team RWBY. He said "I have made more mistakes than any man, woman, or child on this planet." Could this mean that he was once a bad guy? And if this is so, could this mean he and Salem were once allies? That would explain how they know each other. What do you think? 