Mark 4:10-12 NIV

[10] When he was alone, the Twelve and the others around him asked him about the parables. [11] He told them, “The secret of the kingdom of God has been given to you. But to those on the outside everything is said in parables [12] so that, “ ‘they may be ever seeing but never perceiving, and ever hearing but never understanding; otherwise they might turn and be forgiven!’”