1. Create the text layer with "sunset" in it. Place this layer on the bottom of your stack.

2. Create a black fill layer above the text, but below your image of your sunset.

3. Apple-click on the text layer in the layers palette. (Sorry, somebody will have to translate that to PC if you're not on a Mac). This will select the text.

4. Select the sunset-image layer in the layers palatte.

5. Select the "add mask" button on the bottom of the layers menu, making sure that the text is still selected.

Done!

The natural next step for you to consider is to do the same thing with entire sentences, poems, etc. Word placement relative to the parts of the image you are revealing. Composite/montage images consisting of many images used to make many words. Fonts, of course, have a strong effect.

I used to get a kick out of incongruent image/word relationships. "Alice loves me." Only, the word "love" is filled with chains. Something like that. It became a game for me to see how to make the most subtle shift of meaning that I could.

They had chained him down to things that are, and had then explained the workings of those things till mystery had gone out of the world....And when he had failed to find [wonder and mystery] in things whose laws are known and measurable, they told him he lacked imagination, and was immature because he preferred dream-illusions to the illusions of our physical creation.
      -- HP Lovecraft, The Silver Key