It is obvious that a very deep relationship exists between
the spirit of man and the world of existence. It often happens that what we see
in a dream comes to pass in wakefulness; indeed, even in wakefulness when the
soul is unfettered, matters come to mind which later appear in visible form.
This shows that between the reasoning power of man and that visible appearance
there is a spiritual connection. Furthermore, the spirit of man has the power
of discovering facts. When this power is realized, problems become easily
resolved. Amusingly, while materialists are engaged in making discoveries
concerning the strata of the earth, they are immersed in the very spiritual
power whose potency and influence they deny. They also claim to forecast coming
events.
(From a conversation by ‘Abdu’l-Baha, June 10, 1912, New York,
‘Mahmud’s Diary’)