Ego sum Pastor bonus, allelúja: et cognósco oves Meas, et cognóscunt Me Meæ. Allelúja, allelúja.
I am the good Shepherd, alleluia: and I know My sheep, and Mine know Me, alleluia, alleluia.
The Gospel is from John 10: 11-16:
In illo témpore: Dixit Jesus Pharisæis: "Ego sum Pastor bonus. Bonus pastor ánimam suam dat pro óvibus. Mercenárius autem et qui non est pastor, cujus non sunt oves própriæ, videt lupum veniéntem, et dimíttit oves, et fugit: et lupus rapit et dispérgit oves: mercenárius autem fugit, quia mercenárius est, et non pértinet ad eum de óvibus. Ego sum Pastor bonus: et cognósco oves meas, et cognóscunt me meæ. Sicut novit me Pater, et ego agnósco Patrem: et ánimam meam pono pro óvibus meis. Et alias oves hábeo, qum non sunt ex hoc ovíli: et illas opórtet me addúcere, et vocem meam áudient, et fiat unum ovíile, et unus pastor."
At that time Jesus said to the Pharisees: "I am the good Shepherd. The good Shepherd giveth his life for his sheep. But the hireling, and he that is not the shepherd, whose own the sheep are not, seeth the wolf coming and leaveth the sheep and flieth: and the wolf catcheth and scattereth the sheep: and the hireling flieth, because he is a hireling, and he hath no care for the sheep. I am the good Shepherd: and I know Mine, and Mine know Me, as the Father knoweth Me, and I know the Father: and I lay down My life for My sheep. And other sheep I have that are not of this fold: them also I must bring, and they shall hear My voice, and there shall be one fold and one shepherd."
Take note all pastors and bishops and be not hirelings but true shepherds.
We should also note that our Lord says He has sheep that are "not of this fold" who shall hear His voice - perhaps better than those who are currently of His Flock - and they shall become part of the Flock, too.
This should teach us to be humble and not to presume or become complacent. Some who are not currently of the Flock may be judged better than us to sit amongst the saints in Heaven.
Let us pray for them, also, and remember that the Catholic Church is for all, including those who are not yet members. It is not a convenient little club only for cradle Catholics.
God chose the Israelites but all but a few later rejected Him and he transferred His favour to the Gentiles who converted to Him and loved Him better than many of His own chosen people.