Read it through once

In merchantmen, oil for the sailor is more scarce than the milk of queens. To dress in the dark, and eat in the dark, and stumble in darkness to his pallet, this is his usual lot. But the whaleman, as he seeks the food of light, so he lives in light. He makes his berth an Aladdin’s lamp, and lays him down in it; so that in the pitchiest night the ship’s black hull still houses an illumination.