So far I haven’t selected anything from the Book of Mark.

In Book 4 is a series of parables:

1And he began again to teach by the sea side: and there was gathered unto him a great multitude, so that he entered into a ship, and sat in the sea; and the whole multitude was by the sea on the land.

 2And he taught them many things by parables, and said unto them in his doctrine,

verses 2 through 8 is the Parable of the Sower.  Verses 10-12 read:

10And when he was alone, they that were about him with the twelve asked of him the parable.

 11And he said unto them, Unto you it is given to know the mystery of the kingdom of God: but unto them that are without, all these things are done in parables:

 12That seeing they may see, and not perceive; and hearing they may hear, and not understand; lest at any time they should be converted, and their sins should be forgiven them.

In verse 11 Jesus is saying that he is/has made the mystery of the kingdom of God know to his disciples.  He will/has instructed them in detail himself.

With “those who are without”, the multitude, he is teaching in parables.  Is this because if they have to figure out the meaning themselves it will help them get a better understanding?

In verse 12 “lest at any time they should be converted, and their sins should be forgiven”.  Isn’t purpose of teaching the multitude so that will be converted, and their sins forgiven, which could happen at anytime?

Why do you think Jesus uses parables in teaching “the multitude”?