Tradition
St. John Chrysostom
Homilies on the Gospel of John
Homily 53 › John 8:27
“They understood not that He spoke to them of the Father.”
Oh folly! He ceased not to speak concerning Him, and they knew Him not. Then when after working many signs, and teaching them, He drew them not to Himself, He next speaks to them of the Cross, saying,
Source: Homilies on the Gospel of John (New Advent)