You see the sun when it rises, visiting their cave from the right, and when it sets, it touches them from the left, while they are in an enclosure from it. That is from God's signs. Whomever God guides is the guided one, and whomever He misguides, you will not find for him any guiding friend.
Translation endnotes
[18:9-27] These 19 verses contain numerous key words that strongly imply that the story of the cave have double meaning like the verses in chapter 74, and the second meaning is about a prophetic event. I have already observed examples of a hidden mathematical design, and God the most Wise will unveil it when the right time comes. When the secrets contained in the cave is revealed by divine permission, it will prove once again the truth in the assertion at 18:27. [18:16-20] If these youngsters escaped from the persecution of the Church that made the polytheistic doctrine of the Trinity the official doctrine of Christianity through the Nicene conference in 325 AC, then they woke up just after Muhammed and his supporters immigrated to Yathrib.