Mark 4: Inside/outside the God's kingdom.

Jesus saw his disciples as inside the kingdom while others as outside the kingdom.
Jesus talks about the kingdom of God in parables that were interesting stories but with no clear meaning to those outside the kingdom. To the insiders, Jesus explained the parables.

According to NASB:

10 As soon as He was alone, His followers, along with the twelve disciples, began asking Him about the parables. 11 And He was saying to them, “To you has been given the mystery of the kingdom of God, but for those who are outside, everything comes in parables, 12 so that while seeing they may see, and not perceive, and while hearing, they may hear, and not understand, otherwise they might return and it would be forgiven them.”

How to enter in the kingdom? What does it mean to belong to the Lord of universe? How to explain that Jesus is more important than mother and father? How to explain to some outside the kingdom that it is worth to suffer for the truth? How to explain that it not silly to forgive our debtors?

It is very difficult to explain what is to belong to Jesus to the outsiders, yet, Jesus found a way to teach to the outsiders.