Season 9, Episode 7: I Was Made for Lovin' You

 “‎Can two people really be meant to be? M-F-E-O. Soul mates. It would be nice if it’s true, that we all have someone out there waiting for us, us waiting for them. I’m just not sure I believe it…. Maybe I do believe it... All this meant to be stuff... Why not believe it? Really? Who doesn't want more romance in their life? Maybe it’s just up to us to make it happen... to show up and be meant for each other. At least that way you will find out for sure if you’re meant to be or not.”

Season 9, Episode 6: Second Oppinion

“Doctors have never had all the answers. There was a time when you were sick. We’d just drain your blood like you were getting an oil change. We are constantly having to rethink what we thought was true and redefine it. It can be scary to find out you've been wrong about something. But we can't be afraid to change our minds, to accept that things are different… That they’ll never be the same. For better or for worse. We have to be willing to give up what we used to believe. The more we’re willing to accept  what is, and not what we thought, we’ll find ourselves exactly where we belong.”

Season 9, Episode 5: Beautiful Doom

"Sometimes, things are simply out of your control. You can't change them. You can't bend them to your will. It doesn't matter if you're already forty-five minutes late, your hair isn't brushed, you haven't fixed breakfast and you're hemorrhaging brain cells by the second while you sit here.  Dying, dying inside."

Source: http://www.meredith-and-derek.com/quotes/172