When he welcomed Ryan to the family: “You’re a Cohen now. Welcome to a life of insecurity and paralysing self-doubt.”

Then exposed the true order of things: “They’re parents, they work for us.”

When he appreciated the importance of a good do: “I’m gonna go make magic happen. I feel like my hair’s working for me tonight.”

After he lost his virginity: “I was like a fish, flopping around on dry land. Ryan, I was Nemo and I just wanted to go home!” 

That time he gave questionable relationship advice: “I think closure’s overrated. I’m more of a fan of open-ended unrequited love.”

When he got used to living the high life in Las Vegas: “I don’t wanna get thrown out of the hotel. I love the hotel. I wanna marry the hotel and have little gambling-addicted, alcoholic kids with it!”

When he was totally self-aware: “Do I force a confrontation, or do I just continue to be whiny and passive-aggressive until she realises what a catch I am?”

When he questioned his own sanity:
Ryan: “You’re talking to a boat Seth.”
Seth: “Yeah I talk to a plastic horse too but that never worries anyone.” 

When he embraced his heritage:
Seth: “Strangely I feel like my Jew-fro benefits from this climate.”
Summer: “You’re Jewish?”
Seth: “Yes. That’s why I feel so comfortable in this desert heat.”

When he acknowledged his social failings: “My mom’s more popular than me. That’s a little pathetic, I realise.” 

When family time got awkward:
Sandy: “If you can’t tell your dad, who can you talk to?”
Seth: “Gee I don’t know. Ryan, Mom, that tree over there?” 

When he had a scary realisation: “So when you lost your virginity, I was playing Magic: The Gathering.”

When he read too much into a coincidence: “It’s fate, it’s destiny, look we both like burritos!” 

When he made big party plans: “What do you say you come with me. We’ll hang out and we’ll just quietly mock people” 

When he had a totally practical solution:
Kirsten: “Do you guys need anything?”
Seth: “Yes. Ryan needs a tear in the space time continuum so he can go back and say ‘I love you’ to Marissa.” 

That time there were strangers in his house: “Ok, that’s a lot of genitalia in my pool.”

Yup, he always knows his limits:
Summer: “It’s eight o’clock. What are you, like 70?”
Seth: “On the inside, yes.” 

And his strengths: “You’re forgetting one key factor here, Summer. Parents love me. I’ve got this non-threatening, non-sexual vibe”

When he remembered the reason for the season: “Do you know what I dream about when I dream about Thanksgiving, which is often? I dream of eating so much deliciousness that all the blood rushes to my stomach and I pass out on the table. Please don’t deny me that.”

When he jumped to the worst case scenario: 
Summer: “The other night, when we had sex, you weren’t the only virgin in the room.”
Seth: “There was someone else in the room? Like filming us?”

When he knew he was self-absorbed: “Do not change the subject to me because I am powerless not to talk about it.”

When life was just too much: “It’s fine. I’m just having an allergic reaction to the universe.”

Stream all 4 seasons of The O.C. right here!