Light fosters communication and interaction between people. It gives us the ability to relate properly to one another. In a sense, darkness erases distinctions between people, whereas light creates a separation between entities, clarifying their boundaries and bringing out their individuality. At the same time, light brings things together by conferring a sense of unity and shared space. Darkness on the other hand is often associated with chaos.
Light creates physical clarity and spiritual harmony.
In a room without light we trip over the same things that, with light we realize are far from obstacles, but are there to make life easier and more comfortable. This is true with people as well. When there is light between people, we enhance each other's experience. When two people see things the same way, empathize with each other or share similar values, they are said to see things in the same light. This convergence becomes a basis for peace and harmony in their relationship.