The longer you talk to Ron Nimmo, the easier it is to understand why it will be virtually impossible for New York to knock the smile off Brandon Nimmo’s Boy of Summer face.

“Everything you dreamed of — he’s 23 years old, and I bet 20 of those years he’s been dreaming of someday playing in a stadium like this,” Brandon Nimmo’s father said Saturday. “If you tense up in baseball, it doesn’t help. If you try harder, it may backfire. So right now, I just think it’s just pure joy. He’s just so happy to be here.”

The father was sitting in the Mets’ family section again Saturday night when Brandon Nimmo quietly continued his improbable magical mystery ride into the hearts of Mets fans against Cubs ace Jake Arrieta. He walked preceding Neil Walker’s two-run HR in the first and lined a single to right leading off the fifth in Bartolo Colon’s 4-3 victory.

And when it was over, The Kid gushed about Señor Colon.

“He works at a good pace, and he’s always around the plate,” Nimmo said. “He never gives in, and I’m guessing from the other side just from watching, it’s looking like you’re gonna get a tough at-bat every single time because he’s not really giving you much. So it’s really, really fun playing behind him.”

The Kid has sparked the Mets, who will be looking for a four-game sweep Sunday, with his infectious Joy of Summer demeanor. His patience and discipline in his first at-bat against Arrieta reeked of precociousness.

“I was able to watch a little bit of video on him, and you try and pick up a little bit of information here and there from the guys that have faced him,” The Kid said. “And just wanted to get a good pitch to hit. He threw some good pitches that were real borderline and looked good at first but then fell out of the zone, and tried to just put up a hard battle for him and again just to be a tough out if anything. It ended up working out into a walk and just happy about that.

“Then Neil came up and hit a homer so, that was big!” he said with a laugh.

Ron Nimmo has seen this baseball dream grow every step of the way.

“He was probably 18 months old, or maybe 2 years old, he already had a bat and a ball on a tee,” Ron Nimmo recalled. “His brother, being eight years older than him, Brandon looked up to him a lot, and was kind of his role model and his idol. And I can remember he told one of Bryce’s coaches, ‘I’m gonna be better than my brother some day.’ It wasn’t in a conceited way at all. It was just that he always idolized his brother. … That was his barometer. It was like, ‘I need to be better than him,’ because that was the goal.”

Brandon Nimmo’s mother, Patti, was seated alongside Ron.

“I know when he was just like 2 or 3 years old, his mom would go out and play baseball with him for hours in the yard,” Ron Nimmo said.

“She’d have to take cover with him hitting the ball off the tee at her,” he said with a laugh. “At an early age, he was out there hacking away at things. Brandon and I would go play catch, and we would have to throw and catch the ball 100 times, with no drops, or we start over. We would spend hours doing that. If you get to 95 and you drop a ball, you gotta start over at zero. He would play as long as someone would be on the other end catching, retrieving, throwing, whatever. He would do it all day long if someone would play with him.”

Brandon Nimmo said: “Ever since I can remember, I’ve had a bat in my hands. I remember my dad, we would play catch and he would always throw me different pitches and tell me, ‘Hey, tell me what pitch that is.’ And my mom would give me the Windup Wilma — my mom would go out and throw balls to me and I’d hit ’em. It was always just a family bonding experience.”

Fast forward to the 2011 MLB draft. The Nimmos, fearful of an agonizing NFL green room moment, watched it at their Cheyenne, Wyo., home.

“First of all, whether it was the Mets or any professional team, getting drafted in the first round, it just seemed a little surreal to us, I guess would be the best word, because there you are in Cheyenne, Wyoming. … It’s not the hotbed of baseball,” Ron Nimmo said.

The Mets had shown late interest.

“Like, two days before the draft, a guy that was a former Secret Service agent showed up at our house and said he was doing a background check, and we’re thinking, ‘Goodness!’ ” the father said.

The boy’s first home run Friday night thrilled his father.

“I don’t care what your kid is doing, whether your kid is a musician or whatever they do,” Ron Nimmo said. “You’re just thrilled for ’em when they do well. These guys get to go do their job every day in front of the public, and they get automatic feedback whether they’re doing good or bad. It wasn’t a cheap little hit down the right-field line. It was a bomb. Inside, your heart is full and happy, and you’re just like, ‘Gosh, there’s been a lot of dues paid to get to this point.’ And points where you weren’t sure that you would ever be there, right?”

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And the curtain call that followed?

“I just thought, ‘Well, there’s a moment that you never thought you were gonna see,’ ” Ron Nimmo said. “I was thrilled for him. It looks like he’s having fun, and he’s enjoying it. Last Saturday, he was rooming two guys to a room in [Nevada].”

Brandon Nimmo met his proud parents outside the clubhouse after the game.

“Gosh, I’ve had to pinch myself a couple of times because it’s just been surreal and just a dream come true and a prayer come true, and I’m just trying to enjoy every moment of it and soak it in,” he said.

His father is a CPA.

“He always did his job and didn’t complain and worked hard, but we always knew that he didn’t enjoy his job,” Brandon Nimmo said. “And so, I wanted to do something that I enjoyed. He did what he had to do, and he’s created a great life for us and made a great living, but it was more out of, ‘Well this is my job and I have to do it,’ rather than, ‘I’m excited to go to work.’ It’s always been very stressful, especially around April 15. Sometimes I would see him for 30 minutes in the morning and 30 minutes at night. I just wasn’t sure if I wanted that. And that was something that really propelled me to want to play baseball for a living.”

Death, taxes and Brandon Nimmo loving baseball.