The Sabbath, the state of the dead, predestination, eternal security, et. al, are all doctrines that require you to believe something much more incredible than the plain simple truth.
This is what amazes me. at least 72 hours, then at least 48 but no more than 72, then cannot be less than 72 hours, and finally cannot be more than 72 hours.
When Jesus said 3 days and 3 nights I guess that is what he meant!