In response to one of the postings found below, there is no question that leaven has been traditionally deemed a contaminating element. That being said, was Jesus bound to using that pattern in relation to the leaven and the dough parable?
Jesus said that he would reveal things kept secret from the foundations of the earth. The idea of leaven traditionally being bad is taught all over the bible. Is that a big secret? The leaven and the dough is a parable of the kingdom (secret).
Jesus used supernatural power to open the ears of those who had a good heart and intended to hear by saying “he that hath ears to hear, let him hear”.
Obviously those who were attempting to ensnare him in his words would not get the jest of what he was conveying. And Jesus did this intentionally. He declared they have eyes and don’t see, they have ears and don’t hear…and when they’re converted…
I don’t see any problem with using a prominent teaching or custom to express a different aspect or analogy.
But still I don’t think it’s contextually logical for Jesus to after saying in Mark Chapter four verse 20, one thing, and then to meander off into another subject.
20And those sown on the good (well-adapted) soil are the ones who hear the Word and receive and accept and welcome it and bear fruit--some thirty times as much as was sown, some sixty times as much, and some [even] a hundred times as much.
21And He said to them, Is the lamp brought in to be put under a  peck measure or under a bed, and not [to be put] on the lampstand?
22[ Things are hidden temporarily only as a means to revelation.] For there is nothing hidden except to be revealed, nor is anything [temporarily] kept secret except in order that it may be made known.
23If any man has ears to hear, let him be listening and let him perceive and comprehend.
24And He said to them, Be careful what you are hearing. The measure  [of thought and study] you give [to  the truth you hear] will be the measure  [of virtue and knowledge] that comes back to you--and more [besides] will be given to you who hear.
Now, are people aware that they are saying that Jesus, after laying down the foundation of the parable of the sower, that he immediately began talking about sin, the church, immoral women and Satanic infiltration? And thereby totally changing the subject? Isn’t it more logical to stay on the same theme and maybe say the same thing in a different way? That’s what I believe he did. Remember; know body knew what he was saying anyway until he said, “he that had ears to hear let him hear”.
Are we to believe that Jesus went on hiatus in verse 21-25 and picked up on the idea again in verse 26?
26And He said, The kingdom of God is like a man who scatters seed upon the ground,
Or is it more logical to believe that he stayed on the same subject matter? What if I was to say, after saying all this, “the cream rises to the top-all we are is dust in the wind”. Wouldn’t you think, “what on earth is he talking about? That has nothing to do with what he just said”. And yet people are accusing Jesus-the Son of God of doing the same thing. In the presence of possibly hundreds of people.
The reason I chose the Amplified version of this scripture is to bring out something that isn’t as strong in the other translations. Look at verse 22. Things are HIDDEN temporarily only AS A MEANS to revelation. For there is nothing hidden EXCEPT TO BE REVEALED, nor is anything [temporarily] kept secret EXCEPT in order that it may be made known. Notice the purpose or intent in this scripture. A person HID something in his heart FOR THE PURPOSE OF bringing it to light. They got on the front end of the deal. It worked against the scribes and the Pharisees in the negative.
1 In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the LEAVEN of the Pharisees, which is hypocrisy.
2 For there is nothing covered, that shall not be revealed; neither hid, that shall not be known. (The same thing stated in Mark’account)
3 Therefore whatsoever ye have spoken in darkness shall be heard in the light; and that which ye have spoken in the ear in closets shall be proclaimed upon the housetops.
The above verse shows the tie between Mark chapter four “there is nothing hid…” and the parable of the leaven. Now, someone will probably say, “SEE, leaven is a bad thing”. Then why would somebody purposefully hide something in their heart if it were a wicked thing? No, it’s the principle that Jesus is laying down. Leaven isn’t good or bad. It’s just an agent that reacts with our hearts that eventually gets painted on the picture screen of our lives. Why can’t it be the Word of God? Why couldn’t righteousness be the leaven? The person in the above scripture hid it AS A MEANS to revelation. HE WANTED IT MANIFESTED.
It’s very clear that some people just don’t do their studying. And that’s a shame because the Son of God put it in a way that can be figured out, if people will spend some time meditating on it.
I often wondered how Jesus could say to a man “tell no man” without violating the precepts of this very principle. Isn’t he declaring something a secret? Isn’t he whispering something in the ear that will be proclaimed form the housetops? Check out the results of his doing that.
31 And again, departing from the coasts of Tyre and Sidon, he came unto the sea of Galilee, through the midst of the coasts of Decapolis.
32 And they bring unto him one that was deaf, and had an impediment in his speech; and they beseech him to put his hand upon him.
33 And he took him aside from the multitude, and put his fingers into his ears, and he spit, and touched his tongue;
34 And looking up to heaven, he sighed, and saith unto him, Ephphatha, that is, Be opened.
35 And straightway his ears were opened, and the string of his tongue was loosed, and he spake plain.
36 AND HE CHARGED THEM that they should TELL NO MAN:
Now look at the results.
but the more he charged them, SO MUCH THE MORE A GREAT DEAL THEY PUBLISHED IT.
If these things are hard to glean from scripture, it may be because of something else. There is a spirit of humility that rests upon all the teachings of Jesus, and if you don’t understand that, then you won’t get the jest of what Jesus is saying. For more on that, see what I wrote in the article “true humility” under the subject, the parable of the Pharisee and the publican. It may help you to understand these things.