Rudolf Steiner: "These lotus flowers must be present if a person wishes to have the capacity for transformation, for the latter involves these organs unfolding their petals away from the human self and encompassing the world of spirit, leaning into it. The transformational capacity we develop expresses itself for clairvoyant perception in the unfolding lotus flowers. The strengthened sense of I that one develops is an inner stability which we could call an elemental spine. We need to have both: lotus flowers, so that we can transform ourselves; and something resembling a spine in the physical world, an elemental spine, so that we can develop our strengthened I in the elemental world."
Source: Rudolf Steiner, August 26, 1913. Kundalini, p. 59
Another translation of this passage can be found here: