[to Iris] I am so sorry. I didn't want you to find out this way.

Iris: Listen to me. Ever since the night that you told me how you felt, I have not been able to stop thinking about you. At first I was really mad, and then I realized that the reason I couldn't stop thinking about you was because I didn't want to.
Barry: I've never stopped thinking about you.

Joe: You're gonna save the past.
Barry: Joe, I'm gonna save my mom.

I don't know how and I don't know when, but someday soon I'm going to be in this house again 15 year ago, and I'm gonna fail. Unless I don't.

Ronnie: Not the STAR Labs I knew.
Barry: Ronnie, it's not the world that you knew.
Ronnie: Tell me about it.

Martin: What about you? Would you be interested in taking a trip into history?!
Barry: I think I already have.

Barry: If you travel back in time to change something, then you end up being the causal factor of that event.
Cisco: Like Terminator.

Barry: But, that means...
Joe: The second speedster, the one trying to stop the man in yellow...
Barry: Is The Flash. It's me.

Barry: I just need you to know that I don't have those feelings for you anymore.
Iris: Yeah, I know.
Barry: OK.

Martin Stein: And I thought people your age didn't read actual books anymore.
Barry: Oh, I'm the only one.

[to Barry] You change one more time I'm gonna shoot you.

Joe

Barry: Dad, if I was The Flash, don't you think you'd be the first to know about it?
Henry: Yeah. Well if The Flash were my son, I'd tell him a few things. First off, I'd tell him it's a dangerous world so be careful. Then I'd tell him he's a hero and he's saving a lot of lives, but the most important thing for him to know, I feel, is that his father's proud of him.

The Flash Quotes

Ramsey: You know, I don't understand you Barry. You march towards death without fear, just like mum. Where is it you get your strength?
Barry: Probably the same place she did, people I love.

Where I came from, I was a speedster like you. They called me The Flash.

Jay