Points & Lines: 2

When we view the various Sefiros as points or concentric circles, that indicates each Sefirah as standing alone. It is what it is and has no connection to any other Sefriah. Chesed is unadulterated Chesed. Gevurah is Gevurah. As such, they are incompatible with one another. Love is not anger. Chesed is not Din. Each one feels its own sphere is everything.

The line creates the ability to resolve these incompatibilities. A line connects points to each other. It indicates a relationship between the Sefiros and a balance being created between them to afford compatibility. It indicates the actualization of that Sefriah.

The actualization, the bringing forth into the world where it must interact with others, is what enables it to be tempered and to find a means of compatibility with others.

Points & Lines: 1

Kabbalistic works frequently use geometric terms such as points and lines.

The basic understanding is that a point represents the essence of something as it is. It is unconnected and not relating to anything else. A point, visualized as a round circle - whose end reaches back around to its beginning - is  self-contained entity.

A line represents a connection between points. In Kabbalistic terms it would represent a relationship being developed between two concepts that had until now seemed unconnected and possibly in conflict.