We are looking at, and are aware of, the all-encompassing power of the Spirit. Because it is two substances uniting into one (fire and water), steam suggests transformation. It also suggests a transitory experience, since steam also melts away. Steam in dreams can suggest emotional pressure. We are passionate about something without necessarily knowing what it is. Also consult the entries for Fire, Machine/Machinery, Piston and Water, as well as the information on Transformation in the Introduction.