Come to me, all you who labor and are burdened, and I will give you rest. 
The quest for world peace has sadly never been successful.  Just look at the war in the Middle East and Ukraine.  Today's liturgy gives us directions on how a Chistian can find and experience God's peace in the midst of a troubled world.  

Readings: https://bible.usccb.org/bible/readings/070526.cfm