[Gambit]

The ceremony was performed in remembrance of Christ... as a way to recall to each and every Christian that Christ's last night on earth was not spent worrying, retaliating, or doing anything except celebrating what life there was left to Him. Christ led by example, and taught throught metaphorical stories, which are both the reasons that Christianity became so popular.

I don't think the Last Supper was as much of a celebration of the past as a memorial. He said, when He gave the bread and wine, "This do in rememberance of Me." I will grant that He loved the disciples and enjoyed His time with them, and there very well may have been some of that in there. And while you're right, he didn't worry, the death that He knew was coming was far from pleasant and weighed upon Him that last night. Did you know that the bit about how He sweated blood while praying in the garden was taken as just a figure of speech until relatively recently, when doctors dicovered that during times of extreme stress the capillaries can actually burst and blood can leak into the sweat glands?

But as to the reason that Christianity became so popular, I would say that it was, and is, the fact that He is alive and empowers his followers, unlike religions that worship an abstract ideal, the pattern of planets & stars, or someone long dead. The fact that our God is one that is powerful enough to have created the universe and yet still cares deeply about us as individuals. These are the things that set Christianity apart from everything else.