Yeshua does not want everyone to understand what He is saying. He has good reason for this. It is a fulfillment of prophecy. In the Psalms we are told that Elohim will speak in parables for His people to know His Torah (Psalm 78:1-7). These parables are about knowing His Torah.
This is another one of the classic misinterpreted passages in Scripture. People take this one phrase and use it without the ensuing passages following it. If we look at the entire passage, the message is clearly that we are not to judge others if we too are involved in that same sin, even to a worse degree.