Pope Francis is telling young people to keep on shouting and not let people silence them.

"The temptation to silence young people has always existed," the pope said during a Palm Sunday service in St. Peter's Square, according to Reuters.

He said there are many ways to silence young people and "make them invisible."

"Many ways to anesthetize them, to make them keep quiet, ask nothing, question nothing. There are many ways to sedate them, to keep them from getting involved, to make their dreams flat and dreary, petty and plaintive," he said, the news service reported.

"Dear young people, you have it in you to shout," he continued.

"It is up to you not to keep quiet. Even if others keep quiet, if we older people and leaders, some corrupt, keep quiet, if the whole world keeps quiet and loses its joy, I ask you: Will you cry out?"

His comments came a day after hundreds of thousands of people marched in cities across the U.S. to protest gun violence and call for change.

Students who survived the shooting last month at Marjory Stoneman Douglas High School in Parkland, Fla., spearheaded the effort.

Several students who survived the shooting spoke Saturday at the "March for Our Lives" in Washington, D.C., where they gave emotional speeches calling for change and honoring those who died from gun violence.

The students also warned lawmakers that if they don't take action, they will be voted out of office.