Each divine revelation is divided into two parts. The first
part is essential and belongs to the eternal world. It is the exposition of
Divine truths and essential principles. It is the expression of the Love of
God. This is one in all the religions, unchangeable and immutable. The second
part is not eternal; it deals with practical life, transactions and business,
and changes according to the evolution of man and the requirements of the time
of each Prophet.
- 'Abdu'l-Baha (Words of ‘Abdu’l-Baha,
quoted by Dr. J.E. Esslemont in ‘Baha'u'llah and the New Era’)