Laying out his political, security and diplomatic priorities at an extraordinary joint session of parliament at the chateau of Versailles Macron said his government "will work to prevent any new attack, and we will work to fight (the assailants) without pity, without regrets, without weakness."
At the same time, he insisted on the need to "guarantee full respect for individual liberties" amid concerns that new measures would allow police too many powers.
Macron also announced Europe-wide public conferences later this year in an effort to reinvigorate the European Union after Britain's vote to leave.
He said he understood why many Europeans see the EU as bureaucratic, distant and uncaring.
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"I firmly believe in Europe, but I don't find this skepticism unjustified," he said.
He also said European countries should work more closely to help political refugees while fighting migrant-smuggling and strengthening borders against illegal migration.
Lawmakers from the far-left party of Jean-Luc Melenchon and communists decided not to attend the speech in protest against what they call a "presidential monarchy".
After his new centrist party dominated parliamentary elections and split the opposition, political rivals are comparing Macron to Napoleon, or the Roman king of the gods, Jupiter.
They are especially angry that he wants to strip worker protections through a decree-like procedure, allowing little parliamentary debate.
Macron also broke with tradition in convening the Versailles parliament session just one day before his prime minister is to face and likely to win his first confidence vote in parliament.
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