As he departs on his first overseas trip as commander in chief, President Trump reminded the world that all its problems cannot be fixed by the United States.

However, if other nations are committed to the common goal of fighting terrorism, Trump said America must answer their call for aid.

"America cannot solve all of the world's problems, but we can — and we must — help any nation willing to join in the common cause of eradicating terrorism from the face of the earth," Trump said in his weekly address.

Trump is departing for Saudi Arabia on Friday, the first of three stops in a trip abroad that will also include Jerusalem and the Vatican. It's no accident that these three places are the epicenters for three of the world's most enduring religions.

"I will be visiting with the leaders in many different countries to strengthen our old friendships, build new partnerships and unite the civilized world in a fight against terrorism," Trump said. "In that spirit of unity, I will travel to lands associated with three of the world's great religions."

In Saudi Arabia, where Trump will meet the leaders of dozens of Muslim nations, he said he "will represent the views of the American people frankly and clearly."

In Israel, where the Trump administration reportedly is now no longer planning to move the U.S. embassy from Tel Aviv to Jerusalem, the president will discuss "peace and prosperity" with Prime Minister Benjamin Netanyahu. Trump contends that the U.S.-Israel relationship has frayed in recent years, but now, "it's time to renew our friendship." Trump will also meet with Palestinian Authority President Mahmoud Abbas to discuss an elusive Israeli-Palestinian peace deal.

During his meeting with Pope Francis, Trump said, he is looking forward to discussing how "Christian teachings can help put the world on a path to justice, freedom, and peace."

Trump will also attend a gathering of NATO in Brussels and at the G-7 Summit in Italy. While Trump has softened his tone since coming into office about NATO, which he once called "obsolete," Trump once again conveyed his commitment to pressing world allies to pay their fair share.

"They have to help, and I'm sure they will," Trump said. "The fact is that I'm excited about new possibilities for peace and prosperity – and I hope you are too."