Church Fathers Commentary John 10:6

"This parable spake Jesus unto them: but they understood not what things they were which he spake unto them." — John 10:6 (ASV)

St. Augustine of Hippo: Our Lord feeds us with plain words and challenges us with what is obscure. For when two people—one godly, the other ungodly—hear words from the Gospel that neither can understand, one says, “What He said is true and good, but we do not understand it.” The other says, “It is not worth paying attention to.”

The first person knocks in faith, and indeed, if he continues to knock, it will be opened to him. The other, however, will hear the words from Isaiah: If you will not believe, surely you shall not be established (Isaiah 7:9).