Messi's first was something to behold as he glided past the challenge of Ashley Young and curled the ball past a helpless David de Gea.
But his second was rather more fortuitous.
Barcelona's Argentinian forward Lionel Messi (C) celebrates with Barcelona's Brazilian midfielder Philippe Coutinho after scoring during the UEFA Champions League quarter-final second leg football match between Barcelona and Manchester United at the Camp Nou stadium in Barcelona on April 16, 2019.
Manchester United with this defeat now becomes the only team to exit Champions League tournament on seven occasions.
In the first two minutes at the Camp Nou, United did more than they had in 90 minutes at Old Trafford.
22 - Barcelona's Lionel Messi has scored 22 goals in 31 Champions League games against English opponents, more than any other player in the competition.
They were in command after the mercurial Argentine master put them 2-0 up, although they had to ride their luck a bit in the opening exchanges as United threatened a stirring comeback.
He added Messi's majestic display underlined why is he regarded as the best player in the world alongside Cristiano Ronaldo. "The good thing is we play differently to PSG". "Whenever he gets the ball around the box he will be decisive and unfortunately for us he was the victor for them". "In the next few years it is going to be a massive effort to get to the level of Barcelona and these sorts of teams". "I dont mind if we score the victor in the 93rd minute". When you make an error, it can get highlighted and that'll be remembered.
"We have to aspire to get to that level of Barcelona, we can get there but we have loads of work to do", he told BT Sport after the match. "But the memory of what we did in Paris will live with the players because it's not long ago".
Barca will enter the semi-finals as one of the favourites to win the Champions League for what would be their sixth title.