The Yellow Wallpaper by Charlotte Perkins Gilman

[So of course I said no more on that score, and we went to sleep before long. He thought I was asleep first, but I wasn't, and lay there for hours trying to decide whether that front pattern and the back pattern really did move together or separately.
On a pattern like this, by daylight, there is a lack of sequence, a defiance of law, that is a constant irritant to a normal mind.
The color is hideous enough, and unreliable enough, and infuriating enough, but the pattern is torturing.
You think you have mastered it, but just as you get well underway in following, it turns a back-somersault and there you are. It slaps you in the face, knocks you down, and tramples upon you. It is like a bad dream.
The outside pattern is a florid arabesque, reminding one of a fungus. If you can imagine a toadstool in joints, an interminable string of toadstools, budding and sprouting in endless convolutions--why, that is something like it.

That is, sometimes!

There is one marked peculiarity about this paper, a thing nobody seems to notice but myself,and that is that it changes as the light changes.
When the sun shoots in through the east window--I always watch for that first long, straight ray--it changes so quickly that I never can quite believe it.

That is why I watch it always.

By moonlight--the moon shines in all night when there is a moon--I wouldn't know it was the same paper.
At night in any kind of light, in twilight, candle light, lamplight, and worst of all by moonlight, it becomes bars! The outside pattern I mean, and the woman behind it is as plain as can be.
I didn't realize for a long time what the thing was that showed behind, that dim sub-pattern, but now I am quite sure it is a woman.
By daylight she is subdued, quiet. I fancy it is the pattern that keeps her so still. It is so puzzling. It keeps me quiet by the hour.]

I absolutely love this short story by Gilman! She magically paints the picture of a disturbed woman whose husband is a physician who thinks he knows what is best for her. The question is: does he have her best interests in mind, or is he simply a selfish-egotistical male of the time, much like many educated males of the turn-of-the century era?