<p>2:21 <em>I have not written to you because you do not know the truth, but because you know it And because no lie is of the truth</em>- I have suggested that &quot;truth&quot; in John's Gospel refers not simply to abstract &quot;truth&quot; in a general sense, or in terms of correct interpretation; but specifically to the Lord Jesus as &quot;the truth&quot;. This statement that they know the Lord Jesus &quot;the truth&quot; then leads in naturally to the warning in :22 that there are those who deny the Lord Jesus. Such a &quot;lie&quot; cannot be part of those who are &quot;of the truth&quot;, of the Lord Jesus. Those who were stating untruths about the Lord were therefore not to be considered Christian. They knew the truth in that they knew the Lord Jesus, and could therefore discern that the false teachers were not teaching correctly about Him. This is the context both before and after this verse.</p>