Spiritual sense
One of the most annoying things about dreams is that images will vanish
unexpectedly. The mind has a great capacity for ‘magic’; to dream of things
vanishing, and then possibly reappearing, means that we have to work a little
harder from a spiritual perspective to understand.
Psychological / emotional perspective
Just as a child believes in the world of magic, so the dream state is one
that at the time is totally believable. When images vanish in a dream, they
will very often become more tangible in the waking state and available
for interpretation.
Common meanings
There is also the tendency for us to forget various parts of the dream on
waking. The reason is that the subject of the dream has not yet fully fixed
itself in consciousness. Working with dreams on first waking can help to ‘fix’
the information our subconscious is attempting to give us.