Tradition
St. John Chrysostom
Homilies on the Gospel of John
Homily 59 › John 10:6
“This parable spoke Jesus unto them, but they understood not what things they were which He spoke unto them.”
And wherefore spoke He obscurely? Because He would make them more attentive; when He had effected this, He removes the obscurity, saying,
Source: Homilies on the Gospel of John (New Advent)