Role = purpose. See that last link on how to change the past.
And if you want to take that concept further (much further!), see this one:
"If the very existence of the universe is contingent upon the meaning we give it, small surprise that the details also dance to our footsteps."
Worth every word.
Thanks, I will check it out.
You caused me to think about how the Israelites were warned about what to do during passover, and what the Bible warns us to do during the end of age.