What is the high point of all God's dealing with man?
The high point, epitome, and crescendo of all God's dealing with man centers in the death, burial, and resurrection, with the resurrection as the climax. The resurrection sets believers apart, because they have become believers after the resurrection. This is the message Paul has given.
Les explains that the Sabbath was instituted before the Ten Commandments were given; it was the seventh day, a holy day of rest and worship. He warns against calling Sunday the Sabbath, because Sunday is the first day, not the seventh. But he directs attention to Acts 20 to identify the real high point: the very epitome and crescendo of all God's dealing with man centers in not only His death, not only His burial, but His resurrection. That resurrection sets believers apart, because they become believers after His resurrection. Les also connects Paul's message to this, saying that just as God gave the law to Moses on Mount Sinai and Moses took it down to Israel, he feels God took Saul of Tarsus from Damascus down to Mount Sinai.