John's history is quite sad. He has gone through a lot, including giving his kidney to a man he thought loved him who after the surgery, never spoke to him again.
What's great about Locke is how he has this enormous faith and sense that they are all supposed to be there, and they just need to do what the Island tells them to do. He for sure is one that believes in fate and destiny. He is always saying "Can't you see this was meant to happen".
(On a side note-one day I was sitting in history class, and my teacher spits out the name John Locke-apparently he was a famous philosopher. Believe it or not she also said 2 other names from Lost and I can't remember who they were! So I wonder if that was part of the decision in naming the characters.)
John vs. Jack
Jack is always always saying things are just a coincidence and John is saying it all lead up this.
John even calls Jack a "man of science" and calls himself a "man of god"
ALTHOUGH. Let's think about this for a minute. If you had the amazing miracle John had at the very second he landed on the island, wouldn't you be so grateful for the island? John's main view for the whole series is "The island will tell us." Perhaps his healing of his legs is what made him so faithful.
For John Locke, this is all a huge puzzle, and the island will put the pieces together eventually.
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