Work until you have invented the solution to the problem. Loosely means a configuration of the parts often derive their nature of purpose from the whole. Negative space is likewise organized into units The brain tends to relate and group objects of similar shape. Actual weight can be represented by the physical weight needed in a sculpture or architecture. Think of physical balance of standing and lifting something.
Visual weight consists of the heavy or lightness of forms in a composition.
Visual balance is can be identified in four basic ways, 1. Symmetrical , 2. Asymmetrical , 3. Radial , 4. Like shapes are repeated in the same positions on either side of the Central axis.