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...the higher vital is usually much less difficult to surrender, for it is under the influence of the mind and at times even of the psychic; so it understands more easily. It is much easier to convert this than the lower vital which is essentially the vital of desires and impulses. So, you see, what he means is that the lower vital can submit, it agrees to obey, to do what it is asked, but it is not at all satisfied. It is not happy; sometimes it even suffers; it pushes its revolt down into itself through obedience, but it does not collaborate. And unless the vital collaborates with joy and true love, nothing can be done; the transformations cannot come. <ref>https://incarnateword.in/cwm/06/7-july-1954#p8</ref>