"And he taught them many things by parables, and said unto them in his doctrines, Hearken; Behold, there went out a sower to sow."
Mark 4:2-3
Jesus began teaching a crowd in parables.
Later, when He was alone with His disciples, they asked Him the meaning of the parable of the sower.
In a sense they told Him that they didn't understand what He was talking about.
Jesus said to 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" then He continued, "Know ye not this parable? and how then will ye know all parables?"
Jesus was saying, "This is the key.
If you gain understanding of this parable, everything else will start to open up to you."
Many read the Bible and don't understand it.
That's why God gave us the Holy Spirit, to translate, interpret and teach it to us.
The reason they have trouble understanding the Word is because they have never let the Holy Spirit be their teacher.
They try to read it with their own understanding.
The Word is revelation truth!
We need to ask the Holy Spirit to teach us every time we open the Bible.
He is the teacher of the Church and He will reveal to us what is written on its pages.