Van Persie has scored 34 goals in 31 games in 2011 and is only two goals behind Alan Shearer's 1995 Premier League record .
Former No.14 Henry left Arsenal in 2007 after netting 226 times and was quick to praise the current form of Van Persie, suggesting only Barca star Messi and Real Madrid forward Ronaldo are in superior form at the moment.
"What can I say about Robin? I saw him come in here and at the very beginning he wasn't the easiest guy to deal with - like I wasn't, I guess," Henry told Arsenal's official website.
“But it's amazing to see how he has improved. That tells you how intelligent a player he is.
“I'm just in admiration. What he is doing right now, thank God he is playing for us and doing well. It's nice to see a player improve.
“I'm just saying that what Van Persie is doing now, in terms of not just goals but ratio of goals, apart from [Cristiano] Ronaldo and [Lionel] Messi it is ridiculous.
“He is doing something amazing. That also tells you how important it is for him to not get injured."
The former France international also believes it is vital the Dutch maestro does not get injured as he has done in successive previous seasons.
“He has never had a chance to have a full season since he has been here - he was always out for two or three months," Henry added.
“For the very first time he can go on a roll now and you can see the difference. I can only admire what he's doing now.
“I want to insist how important how important it was for me to play with some great players. Without them I wouldn't have been able to play there."
The 34-year-old New York Red Bulls forward also paid tribute to his former team-mates at Highbury.
“When you look at the likes of the back four - Martin [Keown], Nigel [Winterburn], Lee [Dixon], David [Seaman], Lauren who came after, [Sol] Campbell, [Ashley] Cole - I am going to name the whole squad - Patrick [Vieira], Sylvain [Wiltord] too, who was underrated at the time because he was an amazing player. Robert [Pires] as well," he added.
“Without them I wouldn't have been able to do what I did - we went through a season unbeaten.
“I wanted to say that again - without your team you are nothing. It would not have been possible without them so I want to thank them too.”
The event proved a poignant affair for Henry as he failed to hold back his tears.
"When I left Arsenal [was the last time I was that emotional].
"It's part of the past now, but when I did leave Arsenal, yes [I cried]. The guys might be thinking that I'm saying this because I'm here right now but I love Arsenal, I've said it so many times.
"I support the club now and I always come back. There's something about Arsenal Football Club, it's a family club. Every time players want to come back to train, to feel it, the vibe of the dressing room, to see the boss again and all the people at the training ground. There are great people all over the stadium."
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