There are five laws of Gestalt psychology:
Proximity
Similarity
Continuity
Symmetry
Pragnanz (German for "pregnant")
Our minds fill in the missing information, such as a puzzle of connect-the-dots. That is the essential gist of gestaltism. “There are wholes, the behaviour of which is not determined by that of their individual elements, but where the part-processes are themselves determined by the intrinsic nature of the whole. It is the hope of Gestalt theory to determine the nature of such wholes”
-Max Wertheimer (1924).