It was a long time coming but Van Marwijk said the wait was worth it.
“Of course I am very, very happy and proud that such a small country is in the final of a world championship, it is hard to comprehend,” he said after his team overcame Uruguay 3-2.
“It is something I started working on two years ago and I always said that to achieve something you really have to believe in it and do it. It’s been a long process.”
The Dutch must now wait to find out whether they face Germany or Spain, who play the other semi-final in Durban.
Van Marwijk said he had worked hard to instill not just belief but consistency in his side, who have now won all six of their World Cup games as well as all eight of their qualifiers.
“We have so often proved we can win matches against good opponents — if you really believe in something it can come true,” he said.
“At some point the members of the team started believing it and then we had to create the mentality of not being complacent. The players have started to understand this.
“Then, as now, you get an atmosphere in the team and I told them ahead of the match: ‘don’t let them get away with it’.”
Uruguay was not an easy ride
But while Holland progressed, it wasn’t the easy ride that many predicted with Uruguay putting up a rearguard action that saw the match go to a thrilling finale.
Van Marwijk admitted they lost their way in the first-half but showed their backbone by putting that right.
“We started well and had excellent organisation then got the confidence to play a bit more freely and be a bit braver,” he said.
“We did lose grip in midfield in the first-half but at half-time we corrected that.
“Things went wrong every now and then but we took the initiative a bit more and when we scored for 2-1 I had full confidence.
“But then Uruguay suddenly scored a goal and it became really exciting. We didn’t make it 4-1 or 5-1 as it should have, but we survived and we were just so relieved in the dressing room.”
Inter Milan’s Sneijder added that it was a memorable day not just for the team but all Holland.
“This is a wonderful thing for the Netherlands. We have come so far — six wins in a row and now one more match to go,” said Sneijder, who now has five goals in the tournament.
“It’s something fantastic this experience. We have four days to recover then we just have to make it.”
His teammate Robin van Persie was equally ecstatic, but disappointed he didn’t get a goal.
“I feel today’s game was my best so far,” said the Arsenal striker.
“A few people were a bit sad that I didn’t score, but football isn’t always about scoring. Of course I want to score goals, I want to score ten, but I am happy with my own performance.”
Sneijder and Robben steer the Dutch
Two goals inside three second-half minutes, from Wesley Sneijder and Arjen Robben, steered the Dutch into the decider and shattered South American hopes.
Veteran Dutch captain Giovanni van Bronckhorst gave his side the lead on 18 minutes with a stunning 35-metre strike before Diego Forlan produced an equally memorable goal four minutes before half-time to keep Uruguay alive.
Maxi Pereira got one back for Uruguay in injury time but it was too little too late.
“It was a hard match, but all that is forgotten now and we are in the final,” said Sneijder as Holland goes looking for a first World Cup title.
“The most important thing now is to win. We are so close. There is nothing bigger than the World Cup. This is tremendous, fantastic.”
Coach Bert van Marwijk said everyone in the Netherlands can be proud of the team.
“It’s amazing that we have managed to do this. It’s been 32 years (that the Netherlands last played in a final). It is unbelievable. We can be very proud for such a small country.”
Uruguay defender Egidio Arevalo admitted the Dutch had been tough opponents.
“After many years together, we wanted to go as far as the final,” he said.
“But we were defeated by a very strong side, that’s football.”
The last time Holland made it to the final was 32 years ago when they fell at the last hurdle to hosts Argentina 3-1 after extra-time.
Uruguay do nation proud
Despite losing, Uruguay did their small nation proud with coach Oscar Tabarez guiding them to their first semi-final in 40 years.
It was a massive achievement for a country with a population of just 3.4 million, and they must now put their disappointment behind them for a third-place play-off on Saturday.
The Netherlands came into the match as overwhelming favourites after winning all their games in South Africa to go with the eight wins out of eight notched up in qualifying.
Both teams were forced to make changes with players suspended and in chilly conditions at Green Point Stadium it was the Dutch who adapted the best.
They had a decent chance as early as the third minute when Robben whipped in a teasing cross which Fernando Muslera punched straight to Dirk Kuyt on the edge of the box, but the Liverpool winger skied his shot.
The dangerous pair created another opportunity soon after when Kuyt sent in a cross that the Bayern Munich star headed at the keeper.
With the pressure on, it was only a matter of time before the deadlock was broken and it was their hugely experienced captain who did it with a contender for goal of the tournament.
The 35-year-old van Bronckhorst picked up the ball some 35 yards out and let rip with a stunning drive that tore into the top corner of the net past the outstretched fingertips of Muslera.
It should have been 2-0 on the half-hour when Arsenal’s Robin Van Persie made an excellent turn to pick out Robben on the edge of the box, but Martin Caceres made a timely intervention.
Uruguay were struggling to create openings before Forlan produced his own piece of magic with a left-foot screamer that swerved past keeper Maarten Stekelenburg, who should have done better.
Holland looked to up the tempo in the second half but it was Uruguay who nearly took the lead when Khalid Boulahrouz’s back-pass fell short and Edinson Cavani challenged the keeper.
Stekelenburg’s clearance hit Cavani and he teed up Alvaro Pereira, but his floated effort was headed away from danger.
The match was finely poised with both sides creating chances but it was Sneijder who did the damage with his fifth goal of the tournament.
The Inter Milan star unleashed a low right foot drive that took a deflection to put his team in front on 70 minutes.
Uruguay were stunned and Robben took advantage of their guard being dropped with another goal three minutes later with a fabulous header from a Kuyt cross.
The South Americans threw everything they had at Holland as the clock ticked down and got their reward with Pereira’s goal in the second minute of injury time but by then the match was over.