Prime Minister Lawrence Gonzi this afternoon urged the electorate to choose the most competent party to keep Malta's finances sound and strong.
He said this was the only way to ensure jobs, free healthcare and quality education.
"There are seven weeks left and if we work together we could be celebrating again in seven weeks' time," he told supporters in Zabbar at the PN's first mass meeting of the campaign.
Dr Gonzi warned that Labour's Joseph Muscat wanted a change in direction without saying where he wanted to go. But the PN gave Malta peace of mind in the past, present and would continue to do so in the future.
"We wrote the best pages of our country's history books. Others are ashamed even of their own flag," he said, as he warned people not to trust Labour again.
"Wherever we go, we are proud to be Maltese. We were the first to say no to Gaddafi... What a difference from Labour. With Labour you are embarrassed, with the Nationalists you are proud," he added.
Dr Gonzi recalled that Dr Muscat had advised Malta to do like Cyprus and on Xarabank he also let slip that in Cyprus a power station had exploded.
"So that's how you want us to copy Cyprus," Dr Gonzi said to a standing ovation by those sitting on stage around him.
Dr Gonzi slammed Labour's energy plan and warned that building two massive gas tanks near the power station was a serious health and safety risk which could result in an explosion similar to what happened in Cyprus.
He said Labour's own advisers had made is clear that PN's idea of a gas pipeline was a better idea.
"The choice is yours, but the best choice is PN," he said.
Earlier, Simon Busuttil addressed the mass meeting for the first time as deputy leader. He said he was proud that Malta was an "exception in the Mediterranean" because it maintained an impressive reputation while other countries lost face.
He said the country had to choose a captain for the next five years and should not choose someone who wants to change the direction of the country without saying where this change of direction would take us.
He said that Labour leader Joseph Muscat spoke like a Nationalist and wore blue ties because he was embarrassed of showing the "true face" of Labour.
"But we are the real Nationalist Party. They are a fake copy," he said, before urging Dr Muscat to withdraw its energy plans.
"Don't do like you did with VAT, EU membership and the Euro. Change your position now before it is too late," he said.
He said PN did not have the money to fill with billboards and streamers the roads that were built by the Nationalists like Labour did. However, the PN it substance, truth, energy and enthusiasm on its side.