The Netherlands narrowly edged Central American counterparts Costa Rica on penalties to progress through to the semi-finals, as inspired substitute Tim Krul denied the Costa Ricans twice from the spot to send his team through to the last four of the competition.
"The players took the penalties very well, one by one, and then Tim [Krul] worked his magic,” Kuyt told FIFA.com.
“He was intimidating the opposition players and gave it his all.
“That's part of the strength of this squad. We have 23 players and they're all very good at what they do. Any time the manager needs them, they are there.
“We proved once again that we're not doing it with only 11 players.
“We are all one team - one team with one goal."
The Netherlands are the only team left in the competition to have never lifted a World Cup trophy, having come close as they ended up as losing finalists last time out. They are just two games away from victory in Brazil, but standing in their way of a final berth is South American heavyweights Argentina.
"Argentina are a world-class team and they deserve to be in the last four,” said Kuyt.
“But we want to measure ourselves against the best, and not only measure - but win. That's why we're here.
“The semi-finals are fantastic but we know what it feels like to lose a World Cup, and we would love to win [the Trophy]. That's our goal."
The semi-final encounter between the Dutch and the Argentines is scheduled for Wednesday at 10pm South African time.