Quotable Quotes

I am absolutely fascinated by some quotes. There are two that I have heard recently that have really made me think.

1.) Your best friend was once a stranger. (unknown source)

2.) Is it possible that I am not really the person that I have always thought I am? (unknown source)

Do you have quote that stick with you? Please share them with me or comment on the ones that I have shared. I look forward to hearing from you.