Samael Aun Weor
In the tradition of Samael Aun Weor it is taught that most people have only incarnated a fraction of the causal body or human soul. This fraction is known as the Essence or the Buddhata, which in humanity is bottled up in the psychological aggregates that constitute the ego. Samael Aun Weor states:
Thus, the various aggregates that are within ourselves represent different volitional impulses. There are, therefore, several wills within our psyche which fight against each other. The intellectual animal doesn’t have any autonomous, independent and unitotal will. There is no unity in the intellectual animal’s willpower. But when a man has created his Body of Conscious Will, he has individual willpower he can work with in the whole universe.
The way to create the causal body is by working in the "Forge of Cyclops", that is, sexual alchemy between husband and wife.
Read more about this topic: Causal Body