The Earth's climate is broadly stable (a random walk within certain ranges for hundreds of millions -if not billions- of years!) because of the water cycle. The water cycle need only speed up a wee bit to cool the planet if forcings get a bit hotter, and the water cycle need only slow down a wee bit to warm the planet if forcings get a bit colder. Condensation leading to precipitation radiates a great deal of energy into space. Clouds also increase the albedo, though at night they also block the escape of radiation to space from the surface, so this effect not as large as the condensation effect.