<p>13:19 <i>From this time forward I will tell you before it happens, so that when it happens, you may believe that I am he</i>- This refers to the Lord's prediction of Judas' betrayal. He knew that later, they would reflect on all things and perceive that the Lord was master of the whole situation. He had set up the entire stage, including with one of His disciples betraying Him, in order to bring about the end which <i>He</i> intended- that He would be crucified that Passover. His total mastery of the scene (see on 12:12) was a declaration of the Yahweh Name, &quot;I am&quot;, and a sign of His identity with the Father.</p><p>We also see here the intention of prophecy- not in order to predict the future in detail, but so that when things happen, we perceive that they were exactly foretold. This needs to be remembered- for so many attempts to foretell sequences of political events heralding the Lord's return have been proven wrong, and have ended up damaging faith rather than building it up. Bible prophecy is not, therefore, to be appealed to in order to support faith, unless we are pointing out how predictions or required scenarios have already been fulfilled.</p>