May 20

And I say unto you that no calumny is able to prevail against the Light of God; it can only result in causing it to be more universally recognized. If a cause were of no significance, who would take the trouble to work against it!

But always the greater the cause the more do enemies arise in larger and larger numbers to attempt its overthrow! The brighter the light the darker the shadow! Our part it is to act in accordance with the teaching of Bahá’u’lláh in humility and firm steadfastness. 
- ‘Abdu’l-Baha  (From a talk, November 20th, 1911, ‘Paris Talks’)