This thread focuses on Mark 9:1 when in fact it should have focused on Matthew 16:28 and 10:23. Let me outline a way modern Bible scholarship might approach the relevant issues. But first some questions about Gospel sources must be addressed.
The scholarly consensus, both conservative and liberal, takes for granted that Matthew and Luke (but not Mark) have a common saying of Jesus source that they call Q (from the German "quelle" which means "source). Bible scholars then make their case for the original wording of specific sayings that affect our understanding of Jesus' teaching. In his book "Why I am not a Christian" famed British philosopher Bertrand Russell cites Matthew 10:23 (quoted below) as evidence that Jesus wrongly predicted His 2nd coming within the lifetime of some of His audience. This saying is located in Q's mission instructions to His disciples. But Luke 10:1 preserves the original version of this text in a way that removes the apparent error:
"When they persecute you in one town, flee to the next; for truly I tell you, you will not have gone through all the towns of Israel before the Son of Man comes (Matthew 10:23)."
"After this, the Lord sent 70 others ahead of Him into every town and place where He Himself was about to come (Luke 10:1).
This comparison shows that what Q is originally referring to is Jesus' commission of advance teams to notify and prepare each town for Jesus' upcoming arrival on a ministry mission, not His Second Coming!
But how can we know that Luke preserves the original version? By noticing how Matthew transforms Mark's wording of a saying on the kingdom coming in power into another saying on the coming Son of Man:
"Truly I tell you, there are some standing here who will not taste death until they see the Son of Man coming in His kingdom (Matthew 16:28) ."
"And He said to them, Truly I tell you, there are some standing here who will not taste death until they see that the kingdom of God has come with power (Mark 9:1)."
The scholarly consensus, both conservative and liberal, takes this as well established on many grounds--that both Matthew and Luke (but not John) use Mark as a primary source for their Gospels. Thus, to get published in academic Bible journals, articles on Matthew and Luke must factor in how Matthew and Luke have edited Mark. So here Jesus predicts His Second Coming in the preceding saying in both Mark and Matthew. But Matthew deletes Mark's phrase "And He said to them" that changes the subject from the coming Son of Man to the kingdom coming with power and then changes Mark's wording in the next saying to continue the focus on the coming Son of Man.
So how does Mark understand 9:1? Well, after reporting Jesus' promise that "some standing" there will live to see that the kingdom has come with power, he continues by introducing the Transfiguration story with the phrase "6 days later" in 9:2. Mark normally (40 times) connects stories with the vague term "immediately." So why he exception in 9:2? Because Mark is telling us that it took just 6 days for Jesus' prediction about the kingdom to come true; with the return of Moses and Elijah and the glorified appearance of Jesus, the kingdom came in power through this supernatural revelation. But that fulfilment should probably be viewed as a preliminary fulfillment to a later one, perhaps in the power displayed by the outpouring of the Holy Spirit on the Day of Pentecost.
The scholarly consensus, both conservative and liberal, takes for granted that Matthew and Luke (but not Mark) have a common saying of Jesus source that they call Q (from the German "quelle" which means "source). Bible scholars then make their case for the original wording of specific sayings that affect our understanding of Jesus' teaching. In his book "Why I am not a Christian" famed British philosopher Bertrand Russell cites Matthew 10:23 (quoted below) as evidence that Jesus wrongly predicted His 2nd coming within the lifetime of some of His audience. This saying is located in Q's mission instructions to His disciples. But Luke 10:1 preserves the original version of this text in a way that removes the apparent error:
"When they persecute you in one town, flee to the next; for truly I tell you, you will not have gone through all the towns of Israel before the Son of Man comes (Matthew 10:23)."
"After this, the Lord sent 70 others ahead of Him into every town and place where He Himself was about to come (Luke 10:1).
This comparison shows that what Q is originally referring to is Jesus' commission of advance teams to notify and prepare each town for Jesus' upcoming arrival on a ministry mission, not His Second Coming!
But how can we know that Luke preserves the original version? By noticing how Matthew transforms Mark's wording of a saying on the kingdom coming in power into another saying on the coming Son of Man:
"Truly I tell you, there are some standing here who will not taste death until they see the Son of Man coming in His kingdom (Matthew 16:28) ."
"And He said to them, Truly I tell you, there are some standing here who will not taste death until they see that the kingdom of God has come with power (Mark 9:1)."
The scholarly consensus, both conservative and liberal, takes this as well established on many grounds--that both Matthew and Luke (but not John) use Mark as a primary source for their Gospels. Thus, to get published in academic Bible journals, articles on Matthew and Luke must factor in how Matthew and Luke have edited Mark. So here Jesus predicts His Second Coming in the preceding saying in both Mark and Matthew. But Matthew deletes Mark's phrase "And He said to them" that changes the subject from the coming Son of Man to the kingdom coming with power and then changes Mark's wording in the next saying to continue the focus on the coming Son of Man.
So how does Mark understand 9:1? Well, after reporting Jesus' promise that "some standing" there will live to see that the kingdom has come with power, he continues by introducing the Transfiguration story with the phrase "6 days later" in 9:2. Mark normally (40 times) connects stories with the vague term "immediately." So why he exception in 9:2? Because Mark is telling us that it took just 6 days for Jesus' prediction about the kingdom to come true; with the return of Moses and Elijah and the glorified appearance of Jesus, the kingdom came in power through this supernatural revelation. But that fulfilment should probably be viewed as a preliminary fulfillment to a later one, perhaps in the power displayed by the outpouring of the Holy Spirit on the Day of Pentecost.