Human Design is a system that believes that every person has nine energy centers in their body, which can be either defined (colored) or open (white).

Defined centers have consistent energy, while open centers amplify energy from the outside and are not consistent or reliable.

Open centers can be a source of wisdom and sensitivity, but they can also be where a person becomes trapped trying to be something they are not.This is called the not-self.

• The Head center is associated with the pressure to think and can be either defined and inspirational or undefined and amplifying the thoughts of others.
• The Ajna center is how a person thinks and can be either defined and consistent in processing information or undefined and under pressure to hold onto mental opinions.
• The Throat center is about communication and can be either defined and consistent in expressing energy from other centers or undefined and under pressure to speak.
• The G center is the identity of the self and can be either defined and consistent in behavior and expression of love or undefined and constantly changing in different environments.
• The Heart center is associated with willpower, material resources, and self-worth and can be either defined and consistent in access to willpower or undefined and amplifying the willpower of others.
• The Solar Plexus center is the ego and can be either defined and consistent in self-expression or undefined and amplifying the ego of others.
• The Sacral center is the pleasure center and can be either defined and consistent in pleasure-seeking or undefined and amplifying the pleasure of others.
• The Root center is the survival center and can be either defined and consistent in survival instincts or undefined and amplifying the survival instincts of others.
• The Spleen center is the center of the immune system and can be either defined and consistent in immune function or undefined and amplifying the immune function of others.