Because that is the only route by which a mutation becomes real in the species. Ra calls Gate 60 the genetic library, the store of all the genetic information we carry but do not live out, and the door that can release something dormant. Gate 3 is the gate that takes a recessive, hidden genetic loop and brings it into the Sacral, which is where it becomes a generated force in the world. His rule is categorical: no mutation of any kind in human experience can avoid going through the 60 and the 3. Once the 3 has it, he says, the mutation is alive and cannot be stopped. This is also where the often repeated claim about parents needing channel 3-60 comes from. Ra never said that. They describe the 60 and 3 as the bridge the mutation itself travels, not as a qualification for individual couples.
This is not a fact, not medical advice and not a promise of healing. It is part of the cosmology Ra Uru Hu, who founded Human Design, left behind, and nobody knows exactly how it will unfold.
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