John tells Jack his father is alive on the island.
It made me ask myself if I died tomorrow, would I be pleased with the life I've lived; would I be satisfied with the mark I left on the world, or would I even leave a mark and if I would be pleased with the relationships I've had; it gave me a lot of food for thought moments that I appreciated.
In the season finale, it is revealed that the funeral Jack went to in the "flash forwards" was that of John Locke, who had been seeking out the Oceanic Six in his efforts to convince them to return to the island.
After moving the wheel himself, John is transported to the Sahara in 2007, as the time shifts on the island stop and the survivors are stranded with the in 1974.
The appeal narrowed as seasons progressed and the mythology became more complex, culminating in a still-debated finale that was deeply meaningful to some and dissatisfying poppycock to others.
John becomes the new leader of the Others, while Ben moves the island by turning a giant frozen wheel, after which he is transported to the.