I don't think of any sentence as a "one-liner", but I do pay attention to how people actually speak when they are being funny. Rhythm is key.
Lorrie MooreBlasts from the past were like the rooms one entered and re-entered in dreams: they would not stay nailed down. When you returned to them, they had changed - they suddenly had more space or a tilt or a door that had not been there before. New people were milling around, the floors undulated, and the sun shone newly, strangely in the windows, or through the now blasted-open ceiling, or else it shone not at all, as if having fled the sky.
Lorrie MooreYou couldn't pretend you had lost nothing... you had to begin there, not let your blood freeze over. If your heart turned away at this, it would turn away at something greater, then more and more until your heart stayed averted, immobile, your imagination redistributed away from the world and back only toward the bad maps of yourself, the sour pools of your own pulse, your own tiny, mean, and pointless wants.
Lorrie Moore