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.
Although quite gentle, and preferring to be out of the limelight, the INFJ will work long and hard behind the scenes to maintain harmony but they are also intensely independent - both of thought and spirit. ISFJs are deep and caring with strong values and these will be held privately until the ISFJ allows people in.