Mark seems reluctant to name Judas unless it's absolutely necessary. He had given them a token, a sign, saying, Whomsoever I shall kiss, the same is he; take him, and lead him away safely.
The nominal believer can pass. The nominal believer can be admitted to membership of the church. The nominal believer can convince many people that he has a sincere faith, but he is only notional, formal, nominal as a believer. He hasn’t actually been saved; he hasn't actually ever truly repented; he hasn't been illuminated and received a new understanding, and that transformation of life which is conversion. He is not in a relationship with God. He doesn't walk with Christ, and love him deeply and sincerely, and seek to honour him. He hasn't come to hate his sin, and to long to please Christ. He isn’t in the battle against sin. He isn't really changed. Here is a warning about the nominal believer: the nominal believer will ultimately fail and fall. You see it in times of persecution. You see, when it becomes unpopular, such as in our land, to be a believer in Christ. You see nominal believers falling away in their masses. The Victorian age was the end of an age of blessing. Many people were truly converted in all kinds of churches around the country, Protestant believing churches. But then it faded, and the offspring of those believers were nominal believers, or many of them were. They were not personally and deeply saved. So, the great fall began from worship. They were the people who were the first to be convinced by Darwinism and later Freudianism, and so on – the intellectual hostility to the Bible and to the gospel. They were the people who fell for the movement for higher criticism. They were the people who, when the First World War came and all its terrors and horrors, stopped ever going to church, and there began the great falling away in the United Kingdom. From then on, it’s been steep until, at the present day, we are virtually an atheistic country. But the nominals ultimately fall. If you have never deeply found the Lord, and really repented of sin, and found a new life and transformation, and found yourself walking with God, and fighting against sin and doing all for his sake, you are a nominal, and ultimately you will fail. If not before, at death, and when Christ comes again, you will fail. That’s the first warning of the passage.