Ego Authority in Human Design speaks through what is expressed before reasoning takes over — the commitments that arise without forethought, the yes or no that reflects what the will actually wants. There are two expressions of this authority, Ego Manifested and Ego Projected, and understanding the difference is essential to living it correctly.

The Heart Center is one of the four motors in Human Design — governing willpower, self-worth, and the capacity to commit. A defined Heart produces consistent worthiness and the ability to sustain effort in cycles. An undefined Heart — present in roughly sixty-five percent of people — experiences willpower as variable, and carries a particular not-self pressure to prove worth through achievement, overpromising, and taking on more than the actual available energy can sustain.