The friends of God must so live and conduct themselves, and
evince such excellence of character and conduct, as to make others astonished.
The love between husband and wife must not be purely physical, nay, rather, it
must be spiritual and heavenly. These two souls should be considered as one
soul. How difficult it would be to divide a single soul! Nay, great would be
the difficulty!
In short, the foundation of the Kingdom of God is based upon harmony and love,
oneness, relationship and union, not upon differences, especially between
husband and wife....
(‘Abdu'l-Bahá,
from a Tablet; The Compilation of Compilations, Vol. I, Family Life)