As to the difference between inspiration and imagination:
Inspiration is in conformity with the Divine
Texts, but imaginations do not conform therewith. A
real, spiritual connection between the True One and
the servant is a luminous bounty which causeth an
ecstatic (or divine) flame, passion and attraction.
When this connection is secured (or realized) such an
ecstasy and happiness become manifest in the heart that
man doth fly away (with joy) and uttereth melody and
song. Just as the soul bringeth the body in motion, so
that spiritual bounty and real connection likewise moveth
(or cheereth) the human soul.
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As to truthful dreams: I beg of God that thy inner
eye (insight) may be so opened that thou mayest thyself
differentiate between truthful and untruthful
dreams.