Aaron Glenn's first four words at his first news conference as head coach of the New York Jets were charming and disarming: "I wear glasses now," he said with a smile.

The rest of the words from there were not as light-hearted. They were deeply serious and well-thought-out and as forceful as a gut punch.

They showed a little of what we all can expect now that AG has come home.

"Listen, I wanted this job," Glenn said Monday afternoon to the player auditorium at the Atlantic Health Jets Training Center filled with Chairman Woody Johnson and Jets ownership and employees, current and former players, fans and media. "When I was going to my second interviews, I wanted to make sure this was going to be the first of my second interviews because I didn't want to leave the building without shaking Woody's hand and making sure we had a contract.

"It was all about the New York Jets and it's been that way from the beginning."

It's hard to recall any new coach, general manager, unrestricted free agent or top draft choice speaking so compellingly about joining — or in Glenn's case, re-re-joining — the Jets. But that's what Glenn has done, going from the Green & White's first-round pick in 1994 to a scout in 2012 and now to their 22nd head coach.

But the homecoming vibe will quickly wear off without a little coaching fire and brimstone from the new sheriff in town, and Glenn brought along a hearty helping of that in reintroducing himself to the team and its fans.

"Any players here now, put your seatbelts on and get ready for the ride," Glenn said with just a touch of the coaching ferocity he acquired especially in his last four seasons as Detroit's defensive coordinator. "Listen, there are going to be challenges, but with challenges come opportunity. Here's what I do know. We're the freaking New York Jets and we're built for this spit."

But of course he didn't say "spit".

All of that is great, but how will Glenn and his new staff bring the Jets back from this season's 5-12 and nine seasons of sub-.500 ball and 14 years without playoffs? Accountability and culture, familiar themes, gained new impact through his machine-gun delivery of some coaching bullet points and guiding principles..

"Sustained success — that's what we're looking for because I've lived it," he said. "It's going to take hard work and dedication and us as coaches to make sure we teach and continue to teach. The small things are what really win games. The smartest teams win games, situational awareness wins games. It's our job as coaches to make sure we coach that, because the difference between winning and losing is the small things that we're getting ready to teach."

"To me there's no such thing as accountability without responsibility. So it's my job to make sure what your responsibility is. Once the players understand that, then they know they have to be accountable for that. It's not like I'm the one to have to tell them, 'You're wrong.' They'll know it. So we set that standard up front, and the players want that. They've been like that ever since college, they've been structured. So it's my job to make sure I set that structure, and as i set it, I hold them accountable for that, and they understand it."

Glenn explained so much about where he came from and why he stood in front of Jets nation Monday by whom he thanked at the top of his remarks. In no particular order he recognized:

■ His family, starting with his mother and father, then on to Devaney, his wife of 28 years, and the Glenns' three children, who constitute a football family: "We love it, we sleep it, we breathe it, and that won't change."

■ His agent, Jimmy Sexton, and assistant Amy, described in one story as the agent's "office air traffic controller."

■ God, because he said "I would not be standing here today if it weren't for Him."

■ A pantheon of coaches, from his Nimitz HS coach back in the day through Al Groh, former Jets head coach in 2000 whom Glenn remains close to through annual scouting pilgrimages to Groh's home; Sean Payton, current Broncos coach and Glenn's Saints coach "who told me what sustained winning is all about"; and current Lions skipper Dan Campbell.

AG also played, of course, for BP. Bill Parcells was Glenn's head coach on the Jets from 1997-99 and on the Cowboys from 2005-06. When Glenn, after two years away from the NFL, realized he didn't want to run any old business but a football business, he called up the man he said "is the best to ever coach this game."

"I told Bill I want to coach," Glenn recalled. "He said, 'No, you're not going to coach, you're going to scout.' I said I don't want to scout. He said, 'That's what you're going to do because I think you have a chance to be a head coach. The best head coaches are really the best evaluators.' So I took his advice, and it was probably the best advice I've had since coming back in this league."

From Jets scout starting out in the office, then pounding the Southwest and Midwest in his beat-up Honda Accord, Glenn drove his way onto his coaching path, moving up the ranks to become the successful Lions coordinator who got several interviews in previous years before this month's reunion with the Green & White.

"We were going through a head-coaching search with the Broncos," Mougey said. "We asked each candidate to tell us the message he would deliver at his first team meeting. When we interviewed Aaron, he said, 'You want me to do it now?' He pushed back, sat up and delivered a powerful message. We were all looking around like 'Wow!' "

Glenn has further refined his oratorical skills. He's increased his knowledge not only of NFL defenses but offenses and special teams. He's a top talent evaluator. And the Pro Bowl corner from Humble, TX, who now has gray in his trademark beard and on his head and eyeglasses on his face, has the fire that rises up when one comes home to a dream job.

"This has been my start for a number of situations, as a player, as a scout, and now as a head coach," Glenn said of the Jets organization. "You can't write a story better than that. So hopefully this'll be my last stop. That's how I'm looking at it."