Action to reaction to action, is the same as birth to death to rebirth.
In 3d 3rd dimension is the physical plane of the human 5 senses to action to reaction to action.
It only takes baby steps to go from problems to challenges in personal growth through action to reaction to action.
Thoughts are actions (mind). Reaction (emotion), Action (physical) into another spherical self in 3d 3rd dimension of the physical plane, of human 5 senses.
Rebirth is a new thought in same time zone, only in a different dimension of self on a physical plane of existence.
Rebirth is new thoughts in same physical form of human body.
Expansion of self is action to reaction to action of thoughts.
Change your thought patterns and you change your world.