The three triads can be compared to a ladder which the monad climbs on the first stage of its evolutionary journey from plane 1–7. This ladder is mentioned in the Bible in Genesis 28:12: “[Jacob] had a dream in which he saw a ladder resting on the earth, with its top reaching to heaven, and the angels of God were ascending and descending on it”.
The First Self or Personality
The mineral, plant, animal and human kingdoms all operate through the first triad. Our etheric bodies were first acquired when our monads passed through the mineral kingdom, and were built up in the plant kingdom. Our emotional bodies were first acquired when we passed through the plant kingdom, and were built up in the animal kingdom. Our mental bodies (minds) were first acquired when we passed through the animal kingdom, and are being built up now in the human kingdom. In the human kingdom we also have to refine these three subtle bodies and build up our next body, the causal body, so that we can bridge the gap between the first and second triads.