Mark 4:10-12

10As soon as He was alone, those who were around Him, together with the twelve [disciples], began asking Him about [the interpretation of] the parables.

11He said to them, “The mystery of the kingdom of God has been given to you [who have teachable hearts], but those who are outside [the unbelievers, the spiritually blind] get everything in parables,

12so that they will continually look but not see, and they will continually hear but not understand, otherwise they might turn [from their rejection of the truth] and be forgiven.”