<p>8:21 <i>And he said to them: How is it that you do not yet understand?</i>- On their own admission in the Gospel records, the understanding of the disciples was pitiful. Not only did they not really listen to the Lord&rsquo;s words, the words of the Only Begotten Son of God, but they retained many misconceptions from the world around them which did not accept Him. Thus after two miracles relating to bread, they failed to see that literal bread was not so significant to the Lord.</p><p>The disciples were rebuked as being &quot;of little faith&quot; in the matter of not&nbsp;<i>understanding</i>&nbsp;the Lord's teaching about leaven (Mt. 16:8-11). It has been commented that the sayings of Jesus &quot;are everywhere too subtly penetrated with theological claims and dogmatical instruction for the distinction commonly drawn between Christian &quot;ethics&quot; and Christian &quot;dogma&quot; to be other than forced or artificial&quot;. His doctrines lead to His practice. Doctrine is likened by the Lord to yeast- it is going to affect the holder of it.</p>