That must be a side effect of, of your incredible speed. In some future day, you actually move so fast that the resulting kinetic buildup smashes a hole in the space time continuum!

Martin

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.

My spice champion of Central City.

Linda

Cisco: Dr. Wells is a great man. I was nothing when he gave me a job, a chance to change my life. He has helped so many people. He is not a murderer!
Joe: Cisco, I'm a cop. I'm good at reading people. That's how I know I can trust you with my suspicion. When I go talk to the family and friends of a murder suspect, somebody I know is guilty, and I tell them the person they love is a killer, guess what they say. That's not the person I know.

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.

Caitlin: Did you sneak a peek at my goods?
Barry: I wouldn't be much of a hero if I did.
Caitlin: Yeaaaaaaah, but it's OK if you peeked a little. You deserve a peek for all of the good stuff you do.
Barry: Drink lots of water.

[to Barry] You're fast and you can sing?

Caitlin

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