Rocket engines burn chemicals such as petroleum and liquid oxygen at very high pressures and temperatures to turn the chemical energy into motion. In some cases (such as NASA rockets), the force created can be over 1,000,000 pounds-force (4,400,000 newtons). A garden hose shows how moving fluid can create a force.
In general, the INFJ is a deeply warm and caring person who is highly invested in the health of their close relationships, and puts forth a lot of effort to make them positive. They are valued by those close to them for these special qualities.
Each of the 16 personality types can be classified as belonging to one of four temperaments (SJ, SP, NT, NF). For example, INFP belongs to the NF temperament. David Keirsey noted that the four types with N & F are most like each other (idealistic), the four types with S & P are alike (sensation seeking) and so on.