In H. G. Wells's short story "The Door in the Wall," Wallace—who tells the story of his discovery of a magical garden—provides his audience, Redmond, with more questions, than answers.
When Wallace was a young boy of about five years of age, he wandered off and found himself at a long white wall with a green door in it. It seemed to "call" to him in some way, so that even while the boy tried to fight it, he finally charged through the door before he could change his mind. Inside was a wonderful place where this lonely little boy was able to play, see amazing things (like tamed panthers), and feel the warm welcome of its residents, of which there were many different kinds. His departure from this place was forced upon him as he insisted upon seeing his future in a magical book that held all the pieces—the exact experiences—that had made up his life to that point.
When the young Wallace returned home, bereft of his garden and friends, he was punished first by his father and then by an aunt, for making up stories. Except for a very short time, the garden—and the wall and door—occupied a good deal of his attention. And even though he passed the door several times, there was always a reason for him not to enter through it: a pressing engagement to try to win a scholarship or the possibility of a higher political position, etc.
Throughout his life, then, he spent an enormous amount of time wishing he could return to the garden and regretting that he had so often passed over the opportunity for accomplishments that held little real meaning for him: until he sees his lifetime as years filled with only that regret.
By the end of the story, Wallace is depressed and disappointed. The things that the world uses to measure success (and he is considered by Redmond to be wildly successful), are meaningless to Wallace. In pursuing the measure of success in a man's world, he forgot to seek out the joys of youth, maintaining some semblance of the imaginative child he became upon entering the garden so many years ago.
Ironically, Wallace promises himself that if the door appears to him again, which he highly doubts, he will not pass up another opportunity but will enter; and he assures Redmond that he will never return. The narrator, Redmond, is left to ask himself (and the reader) if in the end, Wallace did not do just that.