The law of Love
There was no law that forced Christ into what He did. Nothing on earth or in Heaven compelled it. He said Himself that if He only asked, a legion of angels would be sent by His Father to help Him.
It was only His Love for you that kept him pinned on that Cross. It was only His Love for you that forced him done a hot, dusty road, arms aching, blood pouring out of countless wounds to a hill outside of Jerusalem. It was only His Love for you that made Him endure pain, thirst, fear. He was stripped and tortured...because He loves you.
Today, this Good Friday, remember that most of all, love is not some fuzzy emotion of greeting cards and teenage angst. Love is not a feeling of wanting to please another. Love is not a desire to be wanted and waited upon.
Love is doing what is best - always - for the other. And the best is helping that person become holy, as God wishes them to be holy, to be with Him always.
Remember that today, Good Friday, is not about following the law of fasting and abstinence (although those are solid practices), about laws of the Church. Today is about Love.