Question: Can you explain Matthew 16:28 to me. Is it possible that His kingdom has already come and we are really living out the end-times?
Answer: Most likely Jesus was referring to what happened immediately after that (ch. 17), the transfiguration, which was a kingdom expression of who he really is, the God/Man, whose glory shines forth. Peter, James and John got to witness the “kingdom” in those moments with Christ and Moses and Elijah.
The Corinthians seemed to have bought into a current teaching of false teachers at the time that the kingdom had already come. Paul sarcastically, though with pain and concern for the Corinthians, writes, “I wish that you really had become kings so that we might be kings with you!” (1 Corinthians 4:8). As a result, they had begun to question the resurrection (ch. 15) being a bodily, future event, and posed the idea that it had occurred in a present, spiritual sense. But Jesus made it clear that when he comes again and resurrects believers, no one will be able to miss it. “As lightning that comes from the east is visible even in the west, so will be the coming of the Son of Man” (Matthew 24:27).