Simplistic Intimacy with God.
Psalm 19:7 The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.
God created man with an instant ability to connect to Him. No matter how hard a human tries to separate from God's oneness, He created man with a formula that keeps looping back to Him. A human cannot undo God's love for His Son. By the same token, humans cannot undo their love for humankind. God transferred love to us through His Son Jesus, Jesus connects us to God's love, and the Holy Spirit continually communicates love to us all.
Man sinned in creation, which caused a separation between Holy God and man. God sent His Son Jesus to redeem sinful man and restore lost relationship with the Father. Before Jesus birth, man continually sinned in the presence of God. In His distaste for sinful, evil, rebellious, and wicked man, God sent many Prophets to warn nations of impending judgments. God always sent a warning in the Earth before any type destruction. Man had many opportunities to repent and turn from wicked ways. Look at one example in scripture:
Ezekiel 3:17-20 Son of man, I have made thee a watchman unto the house of Israel: therefore hear the word at my mouth, and give them warning from me.
Eze 3:18 When I say unto the wicked, Thou shalt surely die; and thou givest him not warning, nor speakest to warn the wicked from his wicked way, to save his life; the same wicked man shall die in his iniquity; but his blood will I require at thine hand.
Eze 3:19 Yet if thou warn the wicked, and he turn not from his wickedness, nor from his wicked way, he shall die in his iniquity; but thou hast delivered thy soul.
Eze 3:20 Again, When a righteous man doth turn from his righteousness, and commit iniquity, and I lay a stumblingblock before him, he shall die: because thou hast not given him warning, he shall die in his sin, and his righteousness which he hath done shall not be remembered; but his blood will I require at thine hand.
God's word has a standard. Usually what He commanded men to Prophesy the event happened. In many cases, sinful people repented and asked God for mercy to erase His harsh punishment. God had the Prophet Isaiah prophesy to a group of people who refused to repent and turn from their evils. He actually told Isaiah to speak words declaring great difficulty over their hearing and seeing. God wanted these people to experience woes and hardships because they refused to listen to His commands. Look at this example in scripture:
Isa 6:8 I heard the Lord's voice, saying, "Whom shall I send, and who will go for us?" Then I said, "Here I am. Send me!"
Isa 6:9 ¶ He said, "Go, and tell this people, 'You hear indeed, But don't understand; And you see indeed, But don't perceive.'
Isa 6:10 Make the heart of this people fat; Make their ears heavy, and shut their eyes; Lest they see with their eyes, And hear with their ears, And understand with their heart, And turn again, and be healed."
Isa 6:11 Then I said, "Lord, how long?" He answered, "Until cities are waste without inhabitant, And houses without man, And the land becomes utterly waste,
Isa 6:12 And Yahweh has removed men far away, And the forsaken places are many in the midst of the land.
Looking at God's words in scripture we see how angered He was toward rebellious people. He wanted them to taste pain because they had forsaken Him. How much mercy do you have on others when they wrong you or on your children when they disobey? As time progressed, Jesus came into the world. God now has opportunity to talk to humans through His Son and not just the Prophets. Jesus always spoke whatever His Father told Him (John 15:15). Jesus goes about ministering truth to all that He meets.
Jesus is teaching in Matthew 13, and He speaks to His audience in parable. A parable is a simple way of revealing truths. Jesus captivates His audience to the point their hearts crave understanding, their ears are less heavy, and their eyes are not dull seeing colors and lights. In other words, Jesus audience is sitting on the edge of their seats because they want to know what the Son of God is saying. Jesus disciples were puzzled because they had not seen Him teach kindergarten through out His ministry. The group that Jesus spoke to was from the same ancestral line that Isaiah has spoken to in Isaiah 6. God's word had come full circle from many years ago. Look at the example in scripture:
Mt 13:1 ¶ The same day went Jesus out of the house, and sat by the sea side.
Mt 13:2 And great multitudes were gathered together unto him, so that he went into a ship, and sat; and the whole multitude stood on the shore.
Mt 13:3 And he spake many things unto them in parables, saying, Behold, a sower went forth to sow;
Mt 13:4 And when he sowed, some seeds fell by the way side, and the fowls came and devoured them up:
Mt 13:5 Some fell upon stony places, where they had not much earth: and forthwith they sprung up, because they had no deepness of earth:
Mt 13:6 And when the sun was up, they were scorched; and because they had no root, they withered away.
Mt 13:7 And some fell among thorns; and the thorns sprung up, and choked them:
Mt 13:8 But other fell into good ground, and brought forth fruit, some an hundredfold, some sixtyfold, some thirtyfold.
Mt 13:9 Who hath ears to hear, let him hear.
Mt 13:10 And the disciples came, and said unto him, Why speakest thou unto them in parables?
Mt 13:11 He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
Mt 13:12 For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath.
Mt 13:13 Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
Mt 13:14 And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:
Mt 13:15 For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
Now Jesus is doing the work of an Evangelist among many other things. From the time of Isaiah's ministry to Jesus’s ministry the word of God continually fulfilled itself. Matthew 13, is an example of Jesus speaking softly to people who previously received woes from God. The purpose of Jesus coming into the Earth is clearly defined in John.
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
John 3:17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved.
Jesus understood His job as a Savior and Redeemer. God sometimes used a harsh tone trying to bring people to repentance. Jesus understands that hearts still wax cold and are hardened to truth. Many people do not understand the loving, forgiving nature of Jesus. He wants to see all come to the knowledge of truth in a Risen Savior. Jesus wants all people to understand His thoughts and desire understanding hearts for everyone. The hand of Jesus extends to beggars, thieves, and to born and unborn individuals. The Father and Son loves creation yet knows many do not see Jesus because of ignorance. Jesus is speaking softly so that man's joy may be fulfilled, as we know Him intimately.