Good soil for the coming seed

Mark 4:1-20
Jesus talk about the mystery of the kingdom of God.
A sower went out to sow. The sower sows the word.
Fell by the wayside: Satan comes immediately take away.
Fell on stony ground: no root in themselves,persecution arises for the word's sake,they stumble.
Fell among thorns: the cares of this world,the deceitfulness of riches, and desires for other things.and it becomes fruitful.
Fell on good ground: bear fruit.
The seed and the soils. Listening and understanding.
Why?
God's word is seed, if our heard is good land, has prepared,then it will grow up and have fruit. Most people have much desires,cares of this world. There are not fruit of Holy Spirit.
How?
Be aware to listen the word of the Lord and clean my heart either.