The former Reds striker has watched on with delight and awe as his boyhood team have established a 22-point advantage at the top of the Premier League this season by dropping points only once in 25 matches.
Jürgen Klopp’s side are unbeaten in 42 games in the division in total, stretching back to January 2019, having also become European champions last June.
“It’s unbelievable what’s happening,” Lambert, who was at Anfield for the 2014-15 season, told Liverpoolfc.com.
“I can’t believe the levels they’re getting to, I’ve never seen it before. To see the Reds doing it this year has been unbelievable.
“The city is buzzing. My household is buzzing. It has been brilliant to see. A few of the lads who were there in my time are still there and to see them doing so well, it’s absolutely superb. I’m made up for them.
“The work-rate they are going through is incredible. I cannot believe the levels they are getting to; I know what it’s like to play in the Premier League and to see any team get to those levels, I’ve never seen it before. I’m made up.”
Looking in from the outside, Lambert feels the philosophy of the manager is being supplemented by strong leadership in the dressing room to forge the powerful team spirit that has made Liverpool so difficult to beat.
“It’s the belief installed through Klopp, it’s the rules and standards that Klopp has put in that the players have taken on board and probably raised it even more with the characters he has been able to bring in,” added the 37-year-old.
“There are a few managers within the team who push the standards on or don’t let the standards drop. And all the players are on form. The camaraderie between them is spot on.
“When everything like that comes together you see something unbelievable – and that’s what we’re seeing right now.
“I’ve been in good teams where the camaraderie is well and it helps, you stay to the standards. But to see these standards getting hit by these lads is incredible.”
Inside Anfield: Liverpool 4-0 Southampton