Pretty sure OP understands the concept, given they made this FML with clear awareness of their mistake.

OP said they were given a list of items to pick from, we don't know if either match or a lighter was on that list

Besides, they would be used to start a fire, not as the fuel to keep one going.

I'm really annoyed at the fact that several people didn't read the FML thoroughly enough to know & remember that OP was given a list before commenting..

They were given a list to choose from. They probably only had the 1 book on it.

If the trees on the island bear fruit, you would not want to cut them down for firewood as they are a source of food.

If you cut down the tree, it will no longer grow fruit. You don't want to cut down what might be your only food source.

Amen to that *badum tss*

He was given a list of items,he didn't pick what he personally wanted at the top of his head

Agreed, the clarification didn't make it sound any less sacrilegious to me. Seeing as I'm not a Christian, I can only wonder if it's referencing a passage in the bible that I'm not familiar with?

You guys are both overcomplicating it: OP means that if the island's trees bore fruit, OP wouldn't want to chop them all up for wood and kindling because then a good food source would be gone.

I believe OP is saying that if the trees grow fruit that they don't want to use the trees to start a fire so they won't lose a food source, so they chose to use paper from the bible instead. which still doesn't make a lot of sense since they could use fallen leaves and twigs instead without having to interfere with the food source.

You don't want to cut down trees that feed you.