The Dutch attacker told LFC Magazine: "The team is getting more experience, and importantly, the players are now in it for the long term.
"Important players have agreed new contracts and they all believe they are part of something big. The belief is there.
"Liverpool is a famous club, one of the biggest in the world, and to be part of it with such a great history is something you want to be around as long as possible.
"Every year I am here I am proud. Every year you have to fight for your place and every year there are better and better players coming here to take your place, so I am proud to still be here and to have a new contract."