They were having dinner with their most highly esteemed friend and he looks at them and says “One of you will betray”. Naturally, in the mode of Adam, each of them peppers him with “Not me, right?” The one among who knew that he had hatched a betrayal plot also presses his innocence. The kindness of the highly esteemed friend does not allow him to cover up the facts, so he tags the traitor. He even tells him its time to go to it. It is clear that his affection for the traitor is unshaken, and this comes to light like a supernova in the garden where the traitor’s mannerism betrays his deep affection for the highly esteemed friend: a kiss to remember.
The agreed upon sign was a kiss.
Now the betrayer had given them a sign, saying, “The one I will kiss is the man; seize him.” (Matt 26:48) [I will kiss, fileso, from fileo, fee-LAY-o, I kiss, I am fond of]
In the garden, however, the traitor does not merely kiss the highly esteemed friend, he throws himself into the sign. It is not a peck on the cheek, nor even a smack on the lips. Matthew describes it with katafileo, an all-out display of affection. He got his hands into it with a hug, tightly clasping the highly esteemed friend. He may have had his hands on the cheeks of his friend’s face. It was a kiss full of gusto.
And he came up to Jesus at once and said, “Greetings, Rabbi!” And he kissed him. ( Matt 26:49)