The will of every sovereign prevaileth during his reign, the
will of every philosopher findeth expression in a handful of disciples during
his lifetime, but the Power of the Holy Spirit shineth radiantly in the
realities of the Messengers of God, and strengtheneth Their will in such wise
as to influence a great nation for thousands of years and to regenerate the
human soul and revive mankind. Consider how great is this power! It is an
extraordinary Power, an all-sufficient proof of the truth of the mission of the
Prophets of God, and a conclusive evidence of the power of Divine Inspiration.
(‘Abdu’l-Baha, ’Tablet to August Forel’)