In my opinion, LHP and RHP cannot be defined abstractly, in terms of just one aspect of the principles or aims of a particular path. Instead, I regard LHP and RHP as groupings that have evolved spontaneously, and whose meaning is mainly social and historical.
The cold plate causes the moisture in the warm air, which is inside the jar to condense and form water droplets. This is the same thing that happens in the atmosphere. Warm, moist air rises and meets colder air high in the atmosphere. The water vapor condenses and forms precipitation that falls to the ground.
Water falls from the clouds down to the Earth during precipitation. Water falls when there is too much water in the air. It becomes rain, snow, sleet, or hail. Rain is the liquid form of water. Snow, sleet, and hail are all solid forms of water.