This past Sunday was the Fourth Sunday of Easter, what Catholics call "Good Shepherd Sunday" and the World Day of Prayer for Vocations.
The Gospel at Mass was from John Chapter 10:
“My sheep hear my voice; I know them, and they follow me. I give them eternal life, and they shall never perish. No one can take them out of my hand. My Father, who has given them to me, is greater than all, and no one can take them out of the Father’s hand. The Father and I are one.”