Finally, a performance that thrilled the fans of Manchester United after such a turbulent season start.
The goals are flowing and while this victory may have only raised them to seventh place, the progress Ole Gunnar Solskajer has allegedly seen in training is now visible on the field.
United, famed for his goals, scored only six miserable goals in so many home games before beating Partizan Belgrade 3-0 in the Europa League midweek.
They have scored six goals in their last two home games, with the youngest side having played in the Premier League this season – averaging 23 years and 350 days – and scoring 21 shots, suggesting that the future under Solskjaer is bright.
The return of Anthony Martial, who has been injured for two months, was the key to United's revival. The tie between him, Marcus Rashford and Daniel James was great here, while the French striker scored twice United.
On the right James electrified, while behind him Fred and Scott McTominay dominated the midfield. 19-year-old left-back Brandon Williams made his first league start and was needed to secure the position.
Williams earned standing ovations from United fans and a hug from skipper Harry Maguire when he dropped out in the 90th minute. His assured victory was another big plus for Solskjaer in the afternoon.
The home team had the command from the start and immediately put the guests under pressure. The three leaders of United, James, Martial and Rashford, caused all kinds of problems with Graham Potter.
Martial and Andreas Pereira together plundered the first goal, a quick interaction between the two, the former capped the ball for the latter, whose deflected shot was deflected by Dale Stephens.
Two minutes later, thanks to an own goal, it was 2: 0. The Brighton skipper Lewis Dunk crashed James on the right with a cynical break after the United winger had beaten him.
Fred threw the free-kick into a crowded 6-yard box and Davey Propper eventually turned him into his own net under the pressure of Scott McTomay.
The two-goal lead was well deserved as United played from the beginning and was determined to build on the win over Partizan, where the team could easily have won by a double margin.
In the rare instances in which Brighton threatened, they lacked conviction before the United goal. Shane Duffy sent the ball home after a free-kick from Leandro Trossard in the 28th minute, while Aaron Connolly failed to steer clear of the header.
Brighton almost caught up in the 63rd minute when Neal Maupay parried David De Gea from close range. However, the goal came one minute later when Brighton skipper Lewis Dunk ascended to push the ball forward and give visitors hope.
But that hope was removed two minutes later when Martial shot back the ball for Rashford, who hit the bottom of the bar, to restore United's 2-goal advantage.
It was a case of something sublime or ridiculous for Rashford, who missed a moment later, which was an open goal after James had taken another step to the right and an exquisite delivery.
It could have been six or seven, but United had to settle for three. After a season that started so badly, they will do so with such uplifting progress in their game.
With 11 games in 35 days after the international break, United finally has a springboard from which to start his season.