The Nigeria international star said: "It is a very sad night for me because not until now did I realise I would be leaving.
"I don't hold any grudges against the manager or the chairman because the club has to move on.
"Even though I would have liked to say "goodbye" to the fans in a different way, I have to accept it. I have a lot of good memories and I will be a fan forever.
"I am sad to be leaving. My son was just four months old when we arrived here and now he is four and speaks with a Bolton accent. But I am very happy with what I have achieved here."
"I had a dream from the first day, even though some people had different opinions about it," he said.
"But I kept believing that, because of how I could see the club growing, we would end up in Europe.
"Now the club is talking of moving on to the next level. Unfortunately I won't be part of it. I'd love to be, but that's football life."
"It gives me a great deal of satisfaction knowing I have achieved something people never thought I could do," he said.
"When I took up the challenge, people said I would only spend a year or half a season here, but I've proved them wrong.
"It was a surprise to everybody even my family when I came here but I am glad I did."
"It is sad to leave this fantastic club, more so because I haven't had a great season."
"It's been very tough but I have no bitterness.
"That's what I came here to do and I am glad the fans appreciated it."