It means no worries for the rest of your days. It's a Padre P philosophy. Hakuna matata.  

St. Pio of Pietrelcina—aka Padre Pio—is a beloved 20th century Saint. Franciscan friar, Italian mystic, bearer of the stigmata, and Catholic priest, Padre Pio is perhaps best known for his simple wisdom. He remains a testament to hopeful trust in Christ, and that everything happens within God's will—so there is no cause for stressful worry. Thus the legacy of this great Saint is popularly remembered in his phrase: "Pray, hope, and don't worry." The phrase continues: "Worry is useless. God is merciful and will hear your prayer." Such advice encapsulates Christian confidence and humble living, both seen in the life of Padre Pio. 

Extend the testimony of St. Pio of Pietrelcina to others, regularly regain your inspiration from Padre Pio's example, or exercise generosity by giving a friend the gift of Padre Pio's witness to Christ and His Church with this That One Sheep shirt.